I first met both these gentlemen in 1978 when I began
looking at becoming an entrepreneur in the fledgling fiber optic
business. I had been good friends with Jack when he was at Electronics
Magazine and I was an occasional contributor. Paul I met through a
contact at MIT. Both were exceedingly generous with their time and
providing introductions to others getting started in the industry. In
the very early days, fiber was a very small community and most of us
were open and shared information that would help us all move the
industry forward.
I have no doubt that the work done by these two
accelerated the growth of the industry. Then, AT&T and Corning
dominated the industry, but many other companies like Valtec, Spectran,
OFTI, Automatic Connector, TRW, Hughes, ITT EOPD, and dozens of others
were developing the technologies just as fast if not faster and through
our contacts established at meetings run by Paul and Jack, sharing ideas
and working cooperatively to inform and train the majority of the
people entering the business.
Would the fiber optic industry have developed without these two guys? Sure, but not nearly as fast I bet!
And one story about Paul....
In 1992, Paul organized the first western fiber optic
conference in Russia, "ISFOC-92" in St. Petersburg. He invited some of
us in the US to join him, present papers on what was happening in the US
and meet the contacts he had been making in Russia since the collapse
of the Soviet Union. The meeting was a big success and we made contacts
that led to many years of business with companies in the region.
But that's not the story. The meeting was supposed to
be held in a luxury hotel in St. Petersburg, but at the last moment, the
Mayor kicked our group out for a meeting he was holding. No other
hotels were available so Paul's partners there suggested booking a large
luxury tour boat that docked in the city and cruised local rivers and
lakes. Imagine having a meeting on a small cruise ship.
The ship, the V. Belinsky, proved to be quite
accommodating except that the meeting rooms were small and quite
crowded.
As we cruised around, we were able to see some
interesting sites from the ship and on land, including at one point
walking around an abandoned military base. On the next to the last day,
we were cruising on Lake Ladoga when a terrible storm hit the ship. We
were in a session on the upper deck and the ship was being tossed back
and forth like crazy, but Paul insisted the speakers continue to present
their papers!
That night at dinner, the Captain admitted he was
worried - the ship had been listing more than 20 degrees from side to
side and it was only rated for 25 degrees! As a momento, he signed one
of our badges for me which I have kept as a souvenir!
 
The crew also autographed a pennant from the ship.
Jim Hayes - 10 August 2016
Fiber Optics Art
Fiber
optics has often been used in art and many beautiful photos of fiber
optics have been created. When we checked into our hotel for the
SmartGigCities Bay Area meeting, we found this great photo on the wall.
However, we were less impressed with where the hotel placed it:
But we did find it humorous!
FOA Trains Instructors at IBEW/JATC National Training Institute
FOA participated in its 20th consecutive IBEW/JATC
National Training Institute this summer in Ann Arbor Michigan. FOA has
been a supporter of the IBEW NJATC (now called the "electrical Training
Alliance") summer train-the-trainer program for two decades. This summer
FOA Director and Master Instructor Tom Collins taught a pre-NTI CFOT
course and a TTT course during NTI. FOA's Jim and Karen Hayes did an
evening program on the FOA Design Certification and answered questions
about the FOA. Attendance this year was very high, indicating a high
interest in fiber optics by electrical contractors.
FOA has over 30 local JATCs in the US and Canada
teaching the FOA curriculum and offering FOA certification. At the Ann
Arbor NTI, we signed up a number of new locations also.
Impact of increased bandwidth on the fiber network
An
interesting article on fiber was in the July issue of CI&M magazine.
Written by David Mazzarese of OFS, it looks at the worldwide growth in
data and the capacity of optical fiber needed to maintain this growth.
 CI&M
In the article, Dave estimated the amount of fiber
already installed and the number is quite large to say the least. "How
much additional fiber will be deployed in the future? One way to
estimate this value is to look at developed countries such as Japan and
the United States, where there are approximately 4 kilometers (km) of
optical fiber deployed per household. That amount can be compared to the
world average of about 1.3 km per household (source: CRU August 2015).
With 1.4 billion households in the world, a quick calculation indicates a
need for about 3.8 billion km of fiber to bring the rest of the world
up to the level of countries with highly developed communications
network infrastructures."
Read the article here on CI&M.
Quote Of The Month (From An Industry Insider)
"It's
interesting that manufacturers of directional drilling equipment are
promoting training programs to meet needs of the growing demand to bring
fiber to users. They won't say so, but they are have having difficulty
finding people to train, and the industry has no program to promote the
benefits of a career in installing outside plant cable. There are plenty
of other entry-level construction jobs that pay as well or more, and
are a lot easier to learn and do."
The New Standards Process - Update
In last month's newsletter we discussed the Open Compute Project's (OCP) amazing results at cutting costs of singlemode transceivers for data centers. (See How To Get Fiber Optic Transceiver Costs To Drop 90%).
This article led to several discussions on the way data centers are
being built and how standards are being developed, specifically the move
to singlemode fiber to allow equipment upgrades without cabling changes
and "open-sourcing" the design of electronics.
OCP is a user group started because traditional
vendors were not delivering the solutions needed. Traditional
server/switch vendors were not delivering products with the
performance/price needs of users in mind. Standards for data center
cabling were not based on the realities of the business. In this case,
the "realities" of the business was that technology was allowing - no
requiring - upgrades to the data center every 18-24 months, way too fast
for traditional switch/server manufacturer product upgrades and the
typical 5-year cycle of standards development. One could also say that
OCP is another example of the "disruptor model" of current businesses -
take a completely new look at how to run a business and ignore the past
models - which has become the usual method of operation for current
business startups.
That this model can work for OCP has shown that it is a
valid model for developing standards - in fact it may prove to be a
better method. When products reach commodity status - like data center
servers and switches and their fiber optic transceivers - the input of
real customers is absolutely necessary to get the product designed
right. And real customers are rare in the regular standards committees.
Now Facebook and its partners are taking the same
process to wireless and long haul backbones. Below are overviews of the
projects and links to learn more about them. Will they have a similar
effect on these aspects of the communications business?
Facebook Goes "Open Source" On Wireless
Facebook,
which has shaken up the data center equipment market by creating open
source switches and servers (Open Compute Project, FOA News March 2015 and March 2016)
and is reportedly looking at the same approach for long haul
communications, has introduced a new wireless system for connecting
users with high speed broadband in both urban and rural areas. Here's
their introduction:
"As of the end of 2015, more than 4 billion people were
still not connected to the internet, and 10 percent of the world's
population were living outside the range of cellular connectivity.
Despite the widespread global adoption of mobile phones over the last 20
years, the cellular infrastructure required to support basic
connectivity and more advanced capabilities like broadband is still
unavailable or unaffordable in many parts of the world. At Facebook, we
want to help solve this problem, and we are pursuing multiple approaches
aimed at improving connectivity infrastructure and lowering the cost of
deploying and operating that infrastructure.
Introducing OpenCellular
Today (6 July 2016) we are announcing the OpenCellular
access platform, and over time, we will be open-sourcing the design. We
will also work on other elements like the software management system,
hardware design, baseband, amplifier, filter, mounting device, and
antennas.
One of the reasons the expansion of cellular networks
has stalled is that the ecosystem is constrained. Traditional cellular
infrastructure can be very expensive, making it difficult for operators
to deploy it everywhere and for smaller organizations or individuals to
solve hyperlocal connectivity challenges. It's often unaffordable for
them to attempt to extend network access in both rural and developed
communities.
In many cellular network deployments, the cost of the
civil and supporting infrastructure (land, tower, security, power, and
backhaul) is often much greater than the cost of the cellular access
point itself. One of our goals was to make architectural and design
improvements that would result in lower costs associated with the civil
and supporting infrastructure.
With OpenCellular, we want to develop affordable new
technology that can expand capacity and make it more cost-effective for
operators to deploy networks in places where coverage is scarce. By
open-sourcing the hardware and software designs for this technology, we
expect costs to decrease for operators and to make it accessible to new
participants.
First design
We have implemented an access platform that can support a wide variety of wireless network standards, from 2G and LTE to Wi-Fi access points.
Anyone can customize the platform to meet their connectivity needs and
set up the network of their choosing, in both rural and urban areas. For
instance, the system, due to its on-board computing and storage
capacity, can be configured as network-in-a-box or purely as a cellular
access point."
Could this affect wireless as much as OCP has affected the data center? Time will tell.
Read Facebook's announcement of OpenCellular here.
and there's more.....
Facebook: Partnering to build the Telecom Infra Project (Telecom Infrastructure Goes Open Source)
As
we noted above, Facebook started OCP to revolutionize the development of
data center hardware and operations. The OpenCellular program focused
on the subscriber connection. Now they are putting the same effort into
the Internet backbone with the Telecom Infra Project. Historically
telecom backbone standards had been developed by AT&T before
divestiture in 1984 and then by international standards groups. The
development of these standards has typically been slow and tedious
because of all the varied inputs. Facebook has created a consortium of
interested parties to disrupt this process, bringing it into the current
mode of rapid development and obsolescence as newer tehcnologies make
data transmission more efficient. Here's their explanation:
"As
this OCP work was happening, we recognized that telecom infrastructure
could benefit from the same innovations taking place in the data center.
The power of CPUs and fiber optic network technology has skyrocketed
while simultaneously growing significantly cheaper, and it was clear
that the raw building blocks of what we were developing for our own
infrastructure could be applied to telecom networks with great benefit.
That’s why we’ve co-founded the Telecom Infra Project (TIP). TIP is
bringing together operators, infrastructure providers, system
integrators, and other industry players to work together to develop new
technologies and rethink approaches to deploying network architecture
that leverage these new advances in the technology and an open approach
to development.
We are thrilled to launch TIP with Intel and Nokia,
which have been delivering industry-leading technology solutions for a
very long time, and Deutsche Telekom and SK Telecom, which have both
demonstrated significant leadership in the development of new network
technologies. A number of other technology partners have also joined TIP
and will provide knowledge and operational expertise across all areas
of the telecom stack, driving innovation right from the start.
At first, TIP will focus on disaggregating the
components of network infrastructure that are traditionally bundled
together and vendor-specific. This will give operators more flexibility
in how they build out their networks and enable better, more
cost-effective coverage. TIP members will work across three areas —
access, backhaul, and core and management — to explore new hardware and
software architectures with an eye toward greater simplicity and
efficiency."
Read more about Facebook: Partnering to build the Telecom Infra Project
We'll follow this
development carefully as it is, like the other open source projects,
potentially a major factor in the development of the fiber optic
industry.
The
word on the "Dig Once" program is getting out - FOA is getting calls
from cities asking us for information and advice. It helps that the
current Administration is trying to convince cities of the advantages of
installing ducts or conduits when they dig up a street so they don't
have to do it again. Here are some links for more information.
The DoT page on the administration’s Executive Order: http://www.fhwa.dot.gov/policy/otps/exeorder.cfm
From the Council of State governments: http://www.csg.org/pubs/capitolideas/enews/cs41_1.aspx
From the city of San Francisco: http://sfgov.org/dt/dig-once
An article about Dakota County, MN: https://muninetworks.org/tags/tags/dig-once
And the one to download and hand out:
A “How To” Guide from The Global Connect Initiative: https://share.america.gov/wp-content/uploads/2016/04/6.-GCI-Dig-Once.pdf
7 Commandments for Fiber Optic Professionals
Jerry Morla, Zayim Fiber Optics
After years of training and working with fiber optic
professionals, I have learned that a few practices can help
teams to be more effective at implementing and maintaining their optical
networks. Many of these require little effort, and can make significant
improvements in the quality and performance of
your network. Some of these practices will help to keep you
safe and be more effective at the job, while promoting
professionalism and high standards among fiber professionals. I find
that some of these practices might have greater impact than others,
which is why I consider the following ones to be "commandments for
fiber optic professionals".
• Inspect Connectors and Keep Them Clean
The number one cause of fiber optic network problems is
dirty connectors. Dirt can cause problems like damage to a connector’s
end face, misalignment, and attenuation. Grease, like the one from your
fingers, can cause future problems in networks as high
output lasers can end up burning it, causing charring and clouding
to connector end faces. Make sure to inspect all connectors before
plugging them in. Whenever possible, include an end face inspection
probe image for each connector with your test and characterization
records. Protect your eyes by testing with a power meter for verifying
that fibers are not active before testing with microscopes.
• Be Careful with The Fiber Scraps
The number one cause of injuries when working with
fibers are mishandled fiber scraps. Those tiny fragments of glass will
find the way into your skin and clothes if you are not careful. Even
worse, if you don’t catch these in time and do something like touching
your eyes, you could end up inflicting a potentially painful eye wound
to yourself. Protect yourselves by always wearing safety glasses. You
could also take fiber scraps home with you if these are on your
clothes, so make sure to get them all and dispose properly. Use
appropriate sharps dispensing containers, handle and collect with
tweezers or black electrical tape, and dispose of appropriately. Working
on black surfaces will help you spot these fragments more easily due to
the color contrast.
• Treat Your Splicing Machine Like a Baby
Your fusion splicer is akin to a soldier’s rifle.
Without a good working splicing-set is hard to be effective in the
field. The last thing that you want is that after spending days on a
job, finding high attenuations and bad splices due to faulty equipment.
Safeguard and protect your splice-set from bumps, dirt, and humidity.
Keep it clean, dry, and isolated from dust. Frequently clean the
v-grooves with non abrasive materials or tools. Clean the electrodes and
change them as needed, according to manufacturer recommendations. Keep
the batteries charged. Avoid connecting directly to power plants and use
power conditioners to protect from current peaks that could potentially
damage circuit boards; instead, opt for using the equipment battery
whenever possible.
• Use Appropriate Tools for The Job
Today, there are many tools and gadgets for making field
work easier and safer. Avoid losing your hands to a poorly handled box
cutter. Instead, use appropriate cable prep tools. There are arrays of
specialized tools for tasks like prepping mid-entries, distribution
breakouts, opening flat drop cables, etc., which could save you time,
keep you safe, and protect the fibers (and your fingers). I have seen,
more than once, punctured or cut loose tubes, cut fibers, and damaged
cables due to technicians not using appropriate tools, or simply
preferring to use their pocket knives. Use the best quality
cleavers available to ensure good splices and connections. While there
are excellent options in the market today, I happen to like Jonard
Tools, not only for how practical they are, but also for how affordable.
• Don’t “Guesstimate”… Test it
I see many guys using VFLs for checking short distance
links. That is not the right practice. Every link, regardless of its
length, should be tested with an OLTS for optical loss/attenuation. When
verifying continuity, identifying fibers, checking polarity, or looking
for faults close to the source you can use VFLs, and when checking for
distance, specific events such as splices, and when troubleshooting, you
can use an OTDR; nevertheless, when conducting acceptance tests, for
any link of any type, use a light source and power meter for verifying
that the cable plant is working within specified optical budgets. This
will ensure that your optical equipment will have a clean and useful
optical path. VFLs are a good start, but do not tell you the appropriate
information you need for link verification.
• Use and Produce Useful Documentation
Nothing as bad than completing an installation and not
finding your fiber paths as expected, due to wrong fiber mapping and
crossed splices. In order to avoid this, network design and planning
documentation must be developed accurately and shared effectively from
the start. After installation, appropriate “as built” documentation must
be created, shared, and applied in order to maintain accurate records.
These will be your best friends when conducting maintenance operations,
such as troubleshooting and restoration.
• Get Trained and Certified
You will be surprised of how much there is to know about
designing, installing, and maintaining optimal fiber networks. Often
some take the time for learning once they find that their networks do
not work. Appropriate network design and planning are foundational in
implementing fast, future proof, and reliable networks that help in
gaining and maintaining happy customers, securing your company’s
investment, and keeping your job.
Jerry Morla, Zayim Fiber Optics, is an FOA Master Instructor and Director
Ruby Opto Systems Offers Educational Systems For Fiber Optic Fundamentals
The
present technological advancements in STEM (science, technology,
engineering and math) education have evolved through research on basic
experimentations. Optical fibers applications are no exceptions.
RUBY OPTO SYSTEMS in India has developed a series of
educational apparatus to help demonstrate fiber technology and help
students understand the theoretical and experimental aspects of optical
fiber technology and optical fiber sensor applications.
The design of experiments comprises of losses or
attenuation due to bending (total internal reflection),
misalignments (through beam) and sensing (reflective beam) apart
from losses due to optical fiber end preparation, optical fiber lengths,
source and detector coupling and the numerical aperture of an optical
fiber.
The optomechanical components are ergonomically
designed for the purpose of hands-on experience. The methodical
procedure of conducting the sequence of experiments substantiate towards
the understanding of basic principles and further basic computation of
power budgeting, the fundamental criteria of an optical fiber network.
The seamless integration of modules/ components based on the design of
the experiment make s it versatile and not a mere plug and play
monotonous activity.
For more information, see the Ruby-Opto website or email the developer, Parimal Kowtal at <parimal.kowtal @ gmail.com>
Lennie and Uncle Ted's Guides Are Updated And On The FOA Website
 
Lennie and Uncle Ted's
Guides have moved to the FOA website. Lennie is the place where
many if not most fiber techs begin their education. FOA has just updated
the two guides to ensure they stay relevant - more than 20 years after
they were first written.
Lennie goes all the way back to 1993 when he was
created as the mascot of the original "Fiber U" conference - the same
Fiber U that is now the FOA's web-based training site. Lennie Lightwave's Guide To Fiber Optics
was created as a beginner's introduction to fiber optics. Over 60,000
printed version of Lennie's Guide were given away and it became one of
the first commercial web pages in 1994. Uncle Ted's Guide To Communications Cabling was written a few years later to introduce techs to "Cat 5" - UTP wiring - that had only recently been standardized in TIA-568.
Lennie and Ted's Guides are used in the current
Fiber U online self-study programs and are still the best place to start
learning about fiber optics.
Lennie and Uncle Ted's Guides are online at the links here, can be downloaded as printable PDFs and are now also available as free iBooks on iTunes.
Articles Worth Reading On 
FOA has been posting articles "Worth Reading" on our Pinterest board
instead of including them in our monthly newsletter. If you subscribe
to our board, you get notified when the articles are posted instead of
waiting until the end of the month. Recently postings include:
Sign up at the FOA Pinterest "Worth Reading" board
Two New Books From FOA - Not Just For Installers
These books should be on the bookshelves of network
owners or managers, facilities managers, supervisors of the installers
and anyone else involved with fiber optic networks.
FOA
has published two new books that provide useful information for those
involved in fiber optic projects, and not just for installers. The
latest, the FOA Reference Guide To Fiber Optic Network Design,
is a comprehensive guide to designing fiber optic networks of any type,
from concept to completion. This book looks at design from the initial
need for communications through the process of setting the route of the
cable plant, choosing components, finding a contractor, planning the
installation and documenting the process from beginning to end.
While one might think the focus of the design book is on
the person actually designing the network, it is also aimed at those
for whom the network is being designed - the network owner or manager,
facilities manager, supervisors of the installers and anyone else
involved in the process. We especially think that everyone who contracts
for fiber optic installations should have a copy of this book on their
bookshelf as a reference for when they are involved in a project.
The second book which we released recently, the Outside Plant Construction Guide,
is another book aimed at a wider audience than installers. Certainly
it's of interest to installers, being the only book we know about the
actual construction process of installing fiber optic cables, but it is
also useful to the designer of the network and those who contract for
fiber optic cable plant installation, especially if they are involved in
getting permits and easements or having to explain to others the
process of installation.
Both books, like all FOA books, are inexpensive and available in paperback or Kindle formats.
FOA Reference Guide To Fiber Optic Network Design
FOA has just published a new textbook, the FOA Reference Guide To Fiber Optic Network Design,
a complete guide to designing fiber optic networks, OSP and premises,
for the contractor, installer, designer, project manager, facilities
manager and user. The book covers all aspects of a fiber optic project
from the initial need for the network through the construction phase. It
includes checklists for designers and project managers, appendices on
estimating and standardized project management and guides to case
studies. About all that's missing is CAD and GIS which we leave to those
involved in the software to provide the details on those.
The FOA Reference Guide To Fiber Optic Network Design is now the textbook for the FOA CFOS/D certification courses and a reference for those taking the free online course about Design on Fiber U.
The curriculum for the CFOS/D courses has been updated also with new
material and an introduction to fiber optic technology to make the
course appropriate for a larger audience - not just CFOTs but network
owners and managers, facilities managers, planners, estimators,
supervisors, etc.
The book is available direct from the FOA eStore or Amazon.com where it is also available for Kindle, local booksellers and other distributors.
FOA Reference Guide To Fiber Optic Network Design
ISBN-10: 153088635X
ISBN-13: 9781530886357
$24.95
Read More about the FOA Reference Guide To Fiber Optic Network Design
FOA's
New Outside Plant Fiber Optic Construction Guide - Not Just For
Contractors - Recommended Reading For Network Planners, Designers And
Owners
The FOA has published a new textbook on outside
plant (OSP) fiber optic construction. The book covers topics which
are rare in fiber optic textbooks - practical solutions to designing
and installing the fiber optic cable plant in an OSP environment. It is
an extremely valuable reference book for all owners, designers,
supervisors and installers of fiber optic OSP networks.
This textbook is a complete guide to outside plant fiber
optic construction, covering the process of installing the fiber optic
cable plant starting with the construction work necessary for
installation of both aerial and underground cables before the fiber
optic techs begin splicing, terminating and testing. It is intended as a
companion to the FOA Reference Guide To Outside Plant Fiber Optics and
for use in FOA OSP specialist certification classes. It's also an
excellent reference book for anyone designing or installing fiber optic
networks - even the owners of those networks.
This book was created by Joe Botha of Triple Play Fibre
Optic Solutions in South Africa as a textbook for classes he teaches on
OSP construction. Joe, an FOA Master Instructor, created the course to
fill a need for training OSP construction crews and agreed to share this
useful book with the FOA and the fiber industry.
The FOA Outside Plant Fiber Optics Construction Guide is
available from Amazon books for $14.95 in paperback or $7.95 on the
Kindle.
More information on the FOA Outside Plant Fiber Optics Construction Guide
Want To Learn More About DIY FTTH?
FOA is creating a series of videos on do it yourself (DIY) FTTH. The first three videos are online now:
FOA Lecture 45 Do It Yourself FTTH (Fiber to the Home) What's involved in building a FTTH network of your own.
FOA Lecture 46 Do It Yourself FTTH (Southern Fiberworx) (FOA Newsletter November 2015) How one company, Southern Fiberworx in Cordele, GA did it themselves.
FOA Lecture 46 Do It Yourself FTTH (Southern Fiberworx) (FOA Newsletter November 2015)
Another Source Of Articles On Fiber
FOA President and editor of this newsletter Jim Hayes has also been writing a column in Electrical Contractor Magazine
for more than 15 years now. Electrical contractors do lots of fiber
work and this column has covered some toics they are interested in
including installation processes, network design, fiber applications and
in the last year, a lengthy series on dark fiber - what it is, how's
its used and how it benefits the growth of communication. A recent web
site redesign makes it easier to browse all these articles - just go to http://www.ecmag.com/contributing-authors/jim-hayes and you can see all of them.
Keep Up With Google Fiber News
Google
is moving ahead in Austin and starting in the SE building Google Fiber
networks. They just announced projects in San Diego and Irvine, CA and
Louisville, KY. Here is where to keep track of what is happening
with Google Fiber - the Google Fiber Facebook page!
Fiber Optic Education For Students At Any Age
We
hear about fiber optics all the time - it's in the news whenever we hear
articles about high tech, the Internet and communications, and many
communities are getting "fiber to the home." But few people really
understand fiber optics or how it works. FOA is focused on educating the
workforce that installs and operates these fiber optic networks but
we're always getting inquiries from STEM (science, technology,
engineering and math) teachers who want to introduce fiber optics to
younger students in K-12 grades or technical schools.
Using red laser light (a VFL here but a laser pointer works also) to show how fiber guides light.
FOA has begun developing a series of YouTube videos
intended for teaching students in elementary, middle and high schools
about fiber optics. The first FOA video is titled "Fiber Optics For Teachers."
With this video, we show teachers how fiber works and carries signals
and then explains simple experiments to demonstrate how fiber optics
works in the classroom using some plastic fiber and a laser pointer.
Since many teachers do not know where to get the fiber, the FOA offers
to send them a sample for use in demonstrations in their classroom (USA
only right now.)
At the end of the video, teachers are given directions
on how to request samples of the plastic fiber from the FOA.
This video joins the "Fiber Optics Live" series How Light Travels In A Fiber, Fiber Attenuation and Connector Loss that show how fiber works using simple experiments that can be duplicated in any classroom. More videos will be coming soon.
If you have kids or know some teachers who would be interested, please send them to the introductory video Fiber Optics For Teachers and we'll be glad to help them get started with some entertaining programs for their classrooms.
Resources For Teachers In K-12 And Technical Schools
Teachers in all grades can introduce their students to
fiber optic technology with some simple demonstrations. FOA has created
a page for STEM or STEAM (science, technology, engineering, arts and math) teachers with materials appropriate to their classes. Fiber Optic Resources For Teachers.
If you have kids in school or know teachers who are interested, send them to the FOA page Fiber Optic Resources For Teachers.
Should Your Company Become An FOA Corporate Member?
As all FOA individual members
know, they join the FOA by becoming certified, mostly taking their
CFOTs but some CPCTs, either by attending a FOA approved school or
joining directly based on field experience (our "work to cert"
program.) Over the years, we've been contacted by manufacturers,
contractors, consultants, and other types of organizations who ask about
becoming members.
We don't certify companies or organizations, we told
them, so we were not sure what we could offer as a benefit of
membership. But then, companies asked about using our educational
programs to train employees, how they could get listed on the FOA
website as service providers or if they could get a quantity discount on
membership or certification for all the FOA members working for them.
That began to sound like a benefit for being an FOA corporate member.
And providing a list of useful suppliers to the market could be a
benefit to the industry as a whole.
So FOA has quietly been letting companies and other
organizations join the FOA to take advantage of those benefits so we now
have several hundred corporate members. We've put then into a database
and listed them on the FOA website in map and list form. Here's the map.
The online map and list can be used to find suppliers and service providers.
The map, like our map of schools, lets you find
the FOA corporate members close to you. The table form lists them
by category: Installer/Contractor, Component Manufacturer, Installation
Equip. Manufacturer, Transmission Equipment, Services/Consulting,
Distribution and Users of Fiber Optic Networks. You can sort the tables
to find members meeting your needs, e.g. by location, certifications
offered, etc. Click on any column heading to sort that column; click
twice to sort in reverse order.
How Does An Organization Become An FOA Corporate Member?
Simple, just fill in the online application form.
When your application is accepted, you will be asked to pay the
membership fee - $100US first year, $50US/year or $100US/3years to
renew. You will then be listed on the online map and list, have access to exclusive FOA educational materials for your employees and get discounts on certifications and renewals.
EXFO Offers Super Posters And More
EXFO offers some super posters, guides and books. The FTTx and OTDR posters are really useful! Look at the whole selection here.
What Is The Procedure For Construction Of An OSP Fiber Network?
We recently received an inquiry which we passed along to Joe Botha, author of the new FOA OSP Fiber Optics Civil Works Guide. His answer was a list that provides a simple checklist for OSP construction, so we thought we'd pass it along to everyone.
To answer the question “Please summarize the
construction procedure for ODN network” - Joe responded as shown below:
1. Perform a pre-build survey.
2. Obtain Wayleave (easement) agreements.
3. Prepare a Project Management Plan.
4. Prepare a site-specific Environmental Management Plan.
5. Prepare a site-specific Safety Plan.
6. Prepare a Quality Monitoring and Controlling Plan.
7. Businesses / property owner notifications.
8. Trench, lay ducts, close trench, install MHs and perform reinstatements.
9. Perform DCP Testing.
10. Pre-test cables with an OTDR.
11. Perform DIT testing.
12. Blow or haul cables.
13. Fusion splice cables.
14. Acceptance testing i.e. IL, OTDR, etc.
You can download a free copy of the FOA OSP Fiber Optics Civil Works Guide by Joe Botha here.
MPO Connectors
If
you are interested in MPO connectors, you should read this Belden white
paper "Advances in Multi-Fiber Connectivity." You can download it
at http://info.belden.com/multi-fiber-connectivity-digital.
Looking at all these options and adding the options for
breakouts on each end, you can see how it's easy to fill 23 pages with
diagrams. We've tried to simplify it on an expanded MPO page on the FOA Guide which we recommend you read.
There is a new YouTube video on this part of the MPO polarity -FOA Lecture 44 MPO Connector Fiber Polarity- see below.
New FOA YouTube Videos - Focus On MPO Connectors - Prefab Cabling With MPOs, Testing MPOs and MPO Polarity
We
continue to get inquiries about MPO connectors, especially testing them.
A continual concern is the variability of loss when testing them. It
seems they are not all that repeatable, making testing confusing. We've
tried to create materials that explain them and their use. We've recently added three more videos - all focused on the MPO array connector - to the FOA YouTube channel.
The Panduit PanMPO Connector
FOA Lecture 41 Prefabricated (Preterminated) Fiber Optic Cabling Systems
FOA Lecture 42 MPO (Multifiber, Array) Connectors and How To Test Them
FOA Lecture 43 Managing Polarity of MPO Connectors (using the PanMPO Connector)
FOA Lecture 44 MPO Connector Fiber Polarity
Safety On The Job
 
Safety
is the most important part of any job. Installers need to understand
the safety issues to be safe. An excellent guide to analyzing job
hazards is from OSHA, the US Occupational Safety and Health
Administration. Here is a link to their guide for job hazard analysis.
FOA also has lots of information on safety: FOA Guide, YouTube video and a Safety Poster
"Worth Reading" Is Now On
Join FOA on Pinterest. We have been posting links to pages "Worth Reading" on a special FOA Pinterest page. You can join and keep up to date with the news on our industry which we put there.
Recent
posts cover utilities using new generation telecom, India's plan for
100 smart cities, Cincinnati Bell bets on fiber, various opinions on the
US battle over net neutrality, etc.
Good Practice Tools For OTDRs, All Free
FOA OTDR Simulator
You may already know that the FOA has a free OTDR Simulator you can download from our website (go here for directions)
that allows you to practice using an OTDR on your PC, seeing the
effects of changing setup parameters and analyzing dozens of real world
traces. But here are two more tools that can be good for practice.
OTDR FAQs
Including more hints from FOA Master Instructor Terry O'Malley like
tests on what the end of a fiber trace looks like with broken and
cleaved fibers.
Frequently Asked Questions On OTDRS And Hints On Their Use
"Fiberizer" APP Reads, Analyzes OTDR Traces
Fiberizer
is a iPhone/iPad APP that reads industry-standard ".sor" format files
and allows trace analysis on your iPhone or iPad. An android version is
in the works too. Read more about Fiberizer. And here are more directions on its use.
Events of Interest
SmartGigabit City Meeting Comes To The Bay Area - June 27/28, 2016
Contractors And Installers Take Note - YOU Should Be There!
Here is the information on smartGIGABIT Bay Area
FOA Members: Get Special Discounted Pricing to Attend smartGIGABIT Bay Area
Dates: June 27 & 28, 2016
Hyatt Regency Santa Clara - Santa Clara, California
FOA Members: Click here to Register for 25% off.
The FTTH Council will hold their annual meeting in Nashville, June 13-15, 2016. Register here.
Don't Miss These Seminars and Webinars:
Cabling Infrastructure: A Look Ahead
Monday, June 6, 2016
Held prior to the TIA Network Of The Future conference in Dallas
This full day program invites the audience to
interact and share knowledge with the companies and volunteers who are
establishing the cabling industry norms for installations in the
network. The day begins with the vision of ICT Inside Wiring driven from
the TIA-568 standards and moves through the data center, to DAS,
emerging media, security and a final interactive session addressing the
cabling needs of the next generation networks. Enjoy a Keynote Luncheon
addressing Smart Cities’ visions for the changes and challenges of
bringing them to the future.
The speakers and panelists of the program are the people
who build these standards and are experts in their fields. Audience
members will have a unique opportunity to engage with them and ask
detailed questions about the advances of the standards and what is
coming in the next revisions.
The fee to attend this workshop is a One-Day Pass
costing $250 for TIA members or $300 for non-members. The Pass provides
access to the Monday Luncheon and Reception, as well as the Tuesday
Cybersecurity Breakfast and morning Keynotes. If you prefer to attend
the entire TIA 2016 Conference, you will need to register to receive a
Full Day Pass.
More information here.
Installation and Management of Customer-Owned Outside Plant Cabling by Hubbell and Clearfield
The
specification, design, installation and management of customer-owned
outside plant cabling systems require knowledge, tools and systems that
often differ from those used for in-building communication systems. The
physical conditions are less benign, which affects everything from
installation techniques to the equipment that houses and protects the
cabling. This web seminar hosted by Cabling Installation &
Maintenance addresses several aspects of customer-owned outside plant
cabling administration, emphasizing the capabilities and physical
requirements of products and systems deployed in these environments.
Watch anytime - sign up here.
Fiber Testing - Presented By Jim Hayes, FOA
This
webcast seminar, presented by Jim Hayes, examines several ways in which
fiber testing- both insertion loss and OTDR testing - has evolved. The
seminar will begin with a basic tutorial of fiber-transmission
principles and test fundamentals. It will then discuss the uncertainties
of each fiber-optic measurement method. The seminar will then address
some of the developments that have served to improve the certainty of
test results, as well as how technicians can use their instruments more
effectively to reduce measurement errors.
Watch Anytime - Sign Up Here
~~~~~~~~~~~~~~~~~~
Trends in Fiber Testing & Certification
Presented by Ed Gastle, JDSU
Make sure you're up to date on the current trends and practices for fiber testing and certification.
Now available on demand.
TIA FOTC offers regular webinars and archives them here so you can watch anytime.
~~~~~~~~~~~~~~~~~~~
 New local programs for fiber installation training
See the Light® Fiber Optic Training Program
Webinars, seminars and certification training classes.
Corning offers a library of more than 200 videos that
help our customers with everything from product preparation and
installation to proper testing procedures. Our free Video Library Tool
provides direct links to individual Corning videos, and allows you to
filter by topic or area of interest. Register to download the Video Library Tool.
~~~~~~~~~~~~~~~~~~
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 What's Happening @ FOA
FOA has three LinkedIn Groups
FOA - covers FOA, technology and jobs in the fiber optic marketplace
FOA Fiber Optic Training - open to all, covers fiber optic technology and training topics
FOA School Instructors - a closed group for instructors and administrators at FOA-approved schools
Grupo de La Asociación de Fibra Óptica FOA (Español)
FOA Standards:
FOA now offers free standards for datalinks and testing
the installed fiber optic cable plant, patchcords and cable, optical
power from transmitters or at receivers and OTDR testing.
What Is A Fiber Optic Cable Plant?
In a
recent standards meeting, that issue was discussed with some
disagreement as to what constituted a "cable plant." It seemed to be a
perfect topic for another FOA "1Page Standard," so a draft version is
now uploaded for review (FOA Standard FOA-6, Fiber Optic Cable Plant). Feel free to review it and comment to the FOA at info@thefoa.org.
Available also is a new standard for Datalinks.
Look for the "1 PageStandard" web page and in the FOA Online Reference Guide.
Go to the FOA "1 Page Standards"
NECA/FOA 301 Fiber Optic Installation Standard
Standards
cover components and systems and how to test them, but rarely get into
installation issues. The FOA NECA 301 standard which covers installation
of optical fiber systems has been revised for the second time, adding
considerable new materials. This standard is derived from FOA
educational material put in standards form and approved by ANSI as an
American National Standard. It's specifically written to be used in
contracts to define "installation in a neat and workmanlike manner." The
standard is available from NECA. FOA members can go here for instructions on how to download your free copy.
New FOA OSP Construction Guide
FOA
has some of the world's experts in fiber optic installation as our
certified instructors and it is they who contribute much of the FOA
technical materials. Master Instructor Joe Botha of Triple Play Fibre
Optic Solutions in South Africa has been one of those contributors. Joe
has created a training manual for a new course he is teaching on what
they call "Civil Works" and we would call construction.
Joe's course is a prelude to the FOA Outside Plant Fiber
Optics Course. Before you splice, terminate and test fibers, you must
install cables. Before you install cables, you must place poles for
aerial construction or dig trenches for underground construction. While
that may sound simple and easy, it is no such thing!
The OSP Fiber Optics Civil Works Guide covers the topics
that everyone needs to know - whether you are a network owner/user,
contractor, designer, installer (cable layer, splicer, tester, etc.) It
covers issues like environmental concerns, safety, easements, and more
practical topics like how to dig and back fill trenches.
Joe has created a training manual for his "civils"
course that he wants the FOA to share with everyone. This 48 page manual
covers just about every topic in fiber optic cable plant construction,
including a few that you may never have seen in a manual before. This is
a very important document for everyone involved in OSP construction to
have.
You can download a free copy of the FOA OSP Fiber Optics Civil Works Guide here.
Application of Standard Project Management Processes in Fiber Optic Cable Plant Project Management
By Alfred Sankara, PMP, CFOS/D – Telecommunications Project Manager
Organizations in the communication industry are
proving that adopting proven project management practices reduces risks,
cuts costs, and improves success rates of projects. The present article
demonstrates how standard project management processes apply to fiber
optic cable plant project management.
The article compares the Project Management Institute
(PMI)’s standards and guidelines to the FOA’s best practices in terms of
fiber optic cable plant project management. PMI is the world's
leading not-for-profit professional association for the project,
program, and portfolio management profession. PMI strives to mature the
profession of project management through standards, certifications,
resources, tools, academic research, publications, professional
development courses, and networking opportunities.
The PMI’s Guide to the Project Management Body of
Knowledge (PMBOK ® Guide) defines the project lifecycle as a combination
of the following three (3) main phases: Project Initiation, Project
Execution, and Project Closing. This article shows that the FOA’s fiber
optic cable plant project management lifecycle phases, which include the
Design, Installation, and Testing, fit with PMI’s recommended project
lifecycle.
Alfred Sankara is
a telecommunications specialist who has been active in the planning,
deployment, and operations of telecommunications infrastructure since
1999.In the United States and Africa, Alfred has been involved in the
execution of various telecommunications projects, including plans and
specifications development, fiber optic network deployment (FTTH, SONET,
DWDM, Carrier Ethernet, and OTN) and wireless network implementation
(WiMAX, Wi-Fi, UMTS, and LTE).Alfred co-founded DigiBridge TelCo to
contribute to reduce the digital divide in emerging countries by
assisting governmental entities to deploy state-of-the-art
telecommunications infrastructure.
Download a copy of Alfred's article on project management for fiber optic construction.
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Free Fiber U Self-Study Programs
FOA's
"Fiber U" free online self-study programs help you learn about fiber
optics, study for FOA certifications or use them to help create "blended
learning" classes. There are two new free online self-study programs on
Fiber U. Fiber Optic
Network Design is for those interested in learning more about how to
design fiber optic networks or studying for the CFOS/D certification.
FTTx is for those wanting to know more about fiber to the "x" - curb,
home, wireless, etc. - or studying for the CFOS/H certification.
Got to Fiber U for more information.
Fiber U Online Self-Study Programs Offer Option Of Certificate of Completion
FOA has been offering quite a few free online self-study programs on Fiber U,
our online learning site. We are always getting questions about getting
a certificate for completing the course online, so we have setup an
option to take a test online and get a certificate of completion for
these online courses.
While it's not FOA certification, FOA will recognize a Fiber
U Certificate of Completion as background experience to qualify for
applying for FOA certifications. We also intend to expand the program to
more specialized topics as preparation for FOA specialist
certifications.
If you have associates that want to get started in fiber, have them take this course online to get started. Go to Fiber U and get started.
Lennie & Uncle Ted Now Available As Free Books on iTunes
Lennie Lightwave's Guide to Fiber Optics and Uncle Ted's Guide To Communications Cabling
are now available free to iPad users who can download them from the
Apple iTunes store. Of course they are still available online or for
download.
Lennie's
Guide has always been the world's favorite introduction to fiber
optics. It was first published in the mid-1990s by Fotec, the fiber
optic test equipment company famous for its "Fiber U" training
conferences and more than 60,000 printed copies were distributed. Lennie
was one of the earliest commercial webpages and is still online today
(and as popular as ever) at http://lennielightwave.com. Uncle Ted's Guide
was created at the request of Lennie readers who wanted a similar
simple introduction to "Cat 5" wiring. This latest version of Uncle
Ted's Guide covers the all premises cabling topics - wiring, fiber and
wireless.
You can find these free guides on Apple's iTunes Store or on the FOA website - go here for all the links: Lennie Lightwave's Guide to Fiber Optics and Uncle Ted's Guide To Communications Cabling
FOA Textbook Now Available in French / FOA manuel disponible en français
Available from Amazon.com / Disponible sur Amazon.com
And from Createspace / Et à partir de Createspace
FOA Now Offers Fiber Optic Textbook In Spanish
Guía de Referencia de la Asociación de Fibra Óptica (FOA) Sobre Fibra Óptica
- Reference Books for FOA Certifications available on Kindle and iPad/iPhone as well as printed
  
We have created three new FOA books to be used in
training for FOA certifications and as reference books for contractors,
installers and end users of fiber optics. These books have full
curriculum support, including free curriculum materials for teaching FOA
certification courses. Because we are self-publishing these books using
more modern "publish on demand" technology, they are easier to keep up
to date, easier to buy and much, MUCH cheaper!
All
are now available in print and electronically in Kindle and Apple iBook
versions. The basic fiber optic book is also available as a self-study
program in an Apple APP for iPad/iPhone/iPod.
Details on the new book each of the new books are at the book pages linked to the photos above.
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FOA iPad Apps
FOA LossCalc
 FOA
LossCalc estimates the optical loss of a fiber optic link. This will
save time for the installer of a fiber optic link needing to know
whether test results are reasonable and/or make a "pass/fail"
determination. It can also help the designer of a link to determine if
communications equipment will operate over this link.
By choosing the type of link (singlemode or multimode)
and specifying the length of the fiber and numbers of connections and
splices, it will calculate the end to end loss of the link. The app has
default specifications for singlemode and multimode links or the user
may create custom setups with specifications appropriate for any
application. http://itunes.apple.com/us/app/foa-losscalc/id476262894?mt=8&ls=1
Self -Study in Fiber Optics
 Our
first app is a self-study version of the FOA Reference Guide to Fiber
Optics. The FOA APP builds on the FOA basic fiber optic textbook to
create an interactive learning environment that builds on the iBook
electronic version of the book to add a guide to use for self-study and
real-time testing that provides feedback on what you have learned and
correct answers to questions answered incorrectly.
The FOA APP is priced at only $9.99, same as the iBook,
so the self-study program is free. Download it from the Apple APP Store
with your iPad or iTunes.
http://itunes.apple.com/us/app/foa-guide/id434354283?mt=8&ign-mpt=uo%3D4
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The FOA has many videos on ,
including two Lecture Series (Fiber Optics and Premises Cabling),
Hands-On lectures on both and some other informational and instructional
videos. For all the videos, go to the FOA Channel "thefoainc" or use the direct links below.
DIY FTTH
FOA is creating a series of videos on do it yourself (DIY) FTTH. The first two videos are online now:
FOA Lecture 45 Do It Yourself FTTH (Fiber to the Home) What's involved in building a FTTH network of your own.
FOA Lecture 46 Do It Yourself FTTH (Southern Fiberworx) (FOA Newsletter November 2015) How one company, Southern Fiberworx in Cordele, GA did it themselves.
Three New Component/Installation Videos - Focused on MPO Connectors
FOA Lecture 41 Prefabricated (Preterminated) Fiber Optic Cabling Systems
Prefabricated or preterminated fiber optic cabling
systems are made in a factory and installed with no need for termination
or splicing. This video looks at how they are used, what components
typically are used in manufacturing them and then how to design, install
and use a prefab cabling system.
FOA Lecture 42 MPO (Multifiber, Array) Connectors and How To Test Them
MPO fiber optic connectors are multifiber array
connectors that have from 12 to 72 fibers in a single connector. These
connectors are typically used in prefab (preterminated) fiber optic
cabling systems or parallel optics links. They have some unique
characteristics in their design and use that users need to understand to
implement them successfully. This video will look at their unique
features and discuss how to use and test them in actual cable systems.
FOA Lecture 43 Managing Polarity of MPO Connectors (using the PanMPO Connector)
MPO connectors are complicated to manage because they
have gender (male/female or as it is generally called "pin/no pin"
versions) and keying (generally called "key up/key down"). This creates
problems having the right patchcords to test or connect them in systems.
In this video, we show the variations and how to accommodate them all
with one connector - the Panduit PanMPO. (Thanks to Robert Reid and
Panduit for samples to use in the video.)
For End Users - Who Think Fiber Needs Maintenance
FOA Lecture 39 Maintaining Fiber Optic Networks
Two New Applications Videos
To accompany new FOA certifications in FTTA and Data Centers
FOA Lecture 37: FTTA (Fiber To The Antenna) and Data Center Cabling
FOA Lecture 38: Data Center Cabling
FOA Product Demonstrations
In the June FOA Newsletter, we talked about the new 3M
"disposable" cleaver, the Easy Cleaver, which is provided free with 3M
connectors and mechanical splices that need cleavers. We got samples of
the Easy Cleaver from 3M and tested them ourselves, and they work great.
You can see for yourself how they work in this FOA YouTube Video about the Easy Cleaver.
We also tested the new Ripley/Miller FO-CF Center Feed
Fiber Stripper and used it as an opportunity to show the other three
common types of strippers, the Miller, MicroStrip and NoNik and how they
are used. So you get a review of how to strip fiber and a product
review of the new stripper in this FOA YouTube video about fiber strippers.
New FOA Lectures - Jargon and Jobs
How to Talk Fiber Optics - an introduction to fiber optic jargon - the perfect place to start learning about fiber optics.
Where Are The Jobs In Fiber Optics? FOA talks about all the applications for fiber optics, what jobs involve and the qualifications for the workers in the field.
What's A "Network"
That's a common question from fiber and cabling people.
Even though they may be installing the cable plants for networks, often
the nature of networks is not something they have been exposed to, other
than perhaps the catch-all "star network" description. But what is a
network? What does it connect? How does it connect users and how does it
allocate the bandwidth to them? How do various network types vary?
We've been working on some new YouTube videos on
networks, starting as we usually do on a new subject with the basics. We
have these three videos online now, but watch for more.
Fiber Optics - Live! A series of videos that use lab demonstrations to show how optical fiber works.
Prepolished/Splice Connector Termination (Panduit OptiCam)
Cabling Project Management - what's involved in a copper/fiber/wireless project -advice for the customer and the contractor
Hazards Of Counterfeit Cable
You
may have read the stories we have written about the counterfeit "Cat 5"
cable made from copper-clad aluminum rather than pure copper. Recently
we tried an unscientific burn test on the cable compared to a known good
UL tested cable and posted a video on YouTube. You can see the results
below.
Counterfeit Cable Real UL-rated cable
The difference is obvious and the danger is real. Watch the video on YouTube: Premises Cabling Lecture 11: Counterfeit Cat 5 Cabling
View a complete list of FOA Videos with links to each video on YouTube.
View all the FOA Channel on YouTube.
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What's New in the FOA Online Fiber Optic Reference Guide?
We
have been updating the Online Reference Guide to keep up with changes
in the industry and adding lots of new pages of technical information.
Fiber For Wireless: FTTA and DAS
FOA Guide page on Metrology- the accuracy of measurements
Updated page on Data Centers
Le Guide de référence pour la fibre optique de la FOA est maintenant disponible en français.
Updates for new FOA certifications in FTTA and Data Centers
What do you do when you need to test fiber or cable on a reel? Here is a new page on Bare Fiber Testing
Couplers or splitters are used in FTTH and OLANs. How do you Test Splitters?
Tapping fiber has been a big topic in the news. How do you tap fiber?
The page on Optical LANs (OLANs) has been expanded with new material and links.
What's A Network? A simple explanation of network types and operation has been added to the FOA Online Guide.
We have updated the "Datalinks" page.
Three "Quickstart Guides" for fiber optic testing: cable plant & patchcord loss, power and OTDR
Learn More About OTDRs - Download a Free OTDR Simulator
More and more installers are being asked for OTDR
testing but using these instruments is not easy. They are hard to set up
properly and complicated to interpret the traces. Using the autotest
function can lead to disastrous results! The FOA has a good tutorial on
OTDRs on our Online Reference Guide and we added a free download of an OTDR simulator to the OTDR section so you can learn how to use an OTDR on your PC.
More New Info:
Links to manufacturers and distributors of fiber optic lighting products.
The FOA Online Fiber Optic Reference Guide
has become very popular - perhaps the most popular technical website
ever, typically with over 360,000 users downloading about 1.75 million
pages in 2011! We continue updating materials regularly, keeping it as
up to date as possible.
Find What You Want Using "Google Custom Search
 There's
so much information on the FOA Tech Topics and Online Fiber Optic
Reference Guide that even a well-organized Table of Contents isn't
enough and when the material is always changing, an index is impossible
to maintain. So the FOA is using the latest technology in search, Google
Custom Search, which will allow you to search just the
FOA Tech Topics and Online Fiber Optic Reference Guide for any
topic you want to find more about. Try it!
Go to The FOA Online Fiber Optic Reference Guide.
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New Schools
The FOA welcomes the newest additions to our listing of FOA-Approved Training Organizations:
Southeast Kentucky Community & Technical College, Harlan KY, School # 353
Big Sandy Community & Technical College, Pikeville KY, School # 354
Somerset Community College, Somerset KY, School # 355
Find a listing of all the FOA-Approved schools here.
Find An FOA-Approved Training Organization
Most
inquiries we get regarding finding a FOA-Approved training organization
want to know two things: what school is closest to me or what school
offers the certifications I need. The FOA has about 200 training
organizations we have approved worldwide so finding the right one can be
difficult! We've been looking at ways to make it easier, and we think
we've got a good solution. In fact we have two solutions.
First we have added a sortable table of all the FOA-Approved schools.
You can also use our FOA Google Map to find FOA-Approved schools.
What Should A Fiber Optics or Cabling Tech Know and What Skills Do They Need?
FOA certifications are based on our KSAs - the Knowledge, Skills and Abilities that techs need to succeed. Read the FOA KSAs for fiber and cabling techs.
School News
Feedback
We
always enjoy feedback, especially when it shows how great some FOA
instructors are. These came from students of Tom Rauch, an instructor at
BDI Datalynk:
"I took your fiber optics certification courses this
past March. I just wanted to let you know that in two weeks I start
working as a fiber optic technician with ___ up in ___. You mentioned on
the first day of the course that there is always one guy in class who
had rubbed his last two nickels together to be there and, in that
instance, I was that guy. Now I'm going to be able to provide for my
family like never before and I owe it to the certification that I
received from you and BDI Datalynk. I just wanted to thank you again."
"Thanks to our tremendously knowledgeable and patient
instructor Thomas Rauch, who was not only generous in sharing his wealth
of information, but he did so with ease, humor and in a way that
invited curiosity and participation. He was encouraging and proud of our
accomplishments and helped us learn from our mistakes in a way that did
not break our confidence, rather it pushed us to better results the
next go around. The hands on labs were just AWESOME!" Just thought you
should know what a class act you have representing you in his
travels..... but then again you probably already knew that! : )
In almost 19 years at Verizon and having held numerous
positions, I have gone through many training sessions. I cannot remember
ever having been actually looking forward to coming back to class
quickly after lunch, to get back to the hands on activities, and walking
away with the sense of empowerment that the information presented was
not only relevant but dead on point accurate! I will be signing up for
the Outside Plant class on March! I can't say enough good things about
Tom and his impact! Feel free to quote me, I can only imagine that he
will open so many doors and change so many lives in the years to come,
with his style of teaching! Great experience, awesome job!"
IBEW and FOA Partner on Fiber Optic Training
The International Brotherhood of Electrical Workers (IBEW) and the National Electrical Contractors Association(NECA) through the National Joint Apprenticeship and Training Committee (NJATC) in
a partnership with the FOA has published a new textbook for training
IBEW apprentices and journeymen in fiber optics. The new textbook uses
the material from the FOA Reference Guide To Fiber Optics with new
material and photos from other NJATC training partners.
FOA is pleased to have been able to assist the NJATC in
the development of this new text. FOA has been a NJATC training partner
for many years, including offering instructor training at more than 16
of the NJATC's summer National Training Institutes. A majority of IBEW
NECA contractors do fiber optics and low voltage, especially for
applications that combine electrical and communications cabling like
smart grid, alternative energy, traffic controls, data centers, etc.
Quote from one of our certified instructors: I
want to thank you and your organization for all the resources you
provide for the students and the opportunity to offer the certification
to the students. The fact that you published the book yourself to get
the cost down and the unlimited free resources on your website shows a
commitment to the public that is second to none. I let it be known to
the students that the FOA is the best in the industry at supplying
knowledge and resources related to the communication industry. I look
forward to passing on the information that you provide for the industry.
Great Video About An FOA School And Their Training
BDI Datalynk
trains at the Unversity of Central Florida. UCF created this incredible
video on the BDI Datalynk program. It shows the power of what they offer on campuses around the US.
Watch the video here: http://www.ce.ucf.edu/Program/2583/Fiber-Optics-Network-Certification-Courses-Non-credit/
For more information, contact Bob Ballard, CFOS/I, BDI DataLynk, LLC, A Vietnam Veteran-Owned Company
www.bdidatalynk.com, Ph: 512-785-9024
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Good Question! Tech Questions/Comments Worth Repeating
Real Questions From FOA Newsletter Readers
How Long Does It Take To Transfer Data Over Fiber?
Q: Have there been any studies that show how
long it takes for data to travel over a fiber cable where the point of
origin is 500 miles away vs. a point of origin that is 5000 miles away?
A: There are
several parts to the answer, including travel time in the fiber, the
length of the data packet and processing time in the transceiver:
1. Distance = velocity X time
Light in a glass fiber travels at the speed of light
(c=299 792 458 meters/s) divided by the index of refraction of
the glass (1.4677 @ 1310nm, 1.4682 @ 1550nm). For long distances,
1550nm is used, so the speed of light in the fiber is about
204,190,476 m/s - “about” because of some secondary factors, so
let’s say 204,000 km/s.
That’s about 4.9 ns/km or 4.90 ms/1000km from point A to point B.
2. Then the speed will depend on the data speed of the
network. Obviously a system at 1Gb/s will take ~10 times longer to
transmit a packet of data than a system at 10Gb/s and ~100 times longer
than a 100G system. This speed also depends on the protocol of
transmission which determines the overhead of transmission. Thus a 1000
byte packet has 8,000 bits and will equal about 10,000 bits with
overhead.
To transmit a 1MB file, it requires 1000 packets and
will take ~10Mbits of data, equalling 10milliseconds at 1Gb/s,
1millisecond at 10Gb/s, and 0.01 ms (10microsec) at 100Gb/s.
3. Processing time in transceivers and multiplexers.
Data is usually processed in parallel but transmitted in serial. The
conversion takes some time. Some transceivers also do some pulse shaping
which may take time. Then there are transit times to get parallel data
transmitted throught amps, lasers, (then the fiber link) to a detector
and amps and demultiplexers on the other side.
This is hard to predict times, but it’s ~nanosecs to microsecs. Lets say 1microsecond
For your comparison of 500miles vs 5000miles, for convenience, lets say 1000 and
10,000km, in transmitting our 1MB file
at 1Gb/s
1000km - 4.9ms on the fiber + 10ms + 1microsec = 14.9ms
10,000km - 49ms + 10ms + 1us = 59ms
at 10Gb/s
1000km - 4.9ms on the fiber + 1ms + 1microsec = 5.9ms
10,000km - 49ms + 1ms + 1us = 50ms
at 100Gb/s
1000km - 4.9ms on the fiber + 10microsec + 1microsec = 4.91ms
10,000km - 49ms + 1microsec + 1us = 50.002ms
More Than “Single” Mode?
Q: We're now using SM fibre so it looks like we
don't need mandrels in the Ref Lead at the Light Source. The info
I have is that we need to make a couple of air coils 35mm to 50mm in
diameter. Why?
A: When you
launch from a pigtial laser source through a connector into a reference
cable, you do have several modes being propogated. It usually takes 100m
or so for the second or third order modes to attenuate. So the coil
causes them to be attenuated by the stress enough to no longer be
significant - it’s a mode filter just like MM. If you do not do this,
you will measure higher loss in the fiber and at connections near the
source. Since most SM has traditionally been long distance, the effect
was small or ignorable, but with short links, it can be significant.
Followup Q: But how do we explain multiple modes in Single Mode fibre?
A: When you get the core of the fiber down to ~5-6 times
the wavelength of the light, it no longer acts like geometric optics
(like MM fiber). Some of the light can travel outside the core (see the
note on “waveguide
dispersion”here http://www.thefoa.org/tech/ref/testing/test/CD_PMD.html).
At launch, significant amounts of power are at higher angles creating
short lived modes that are highly attenuated.
Replacing OM1 MM Fiber
Q: We are an automation system integrator in
South Africa. We have a client that has multimode 62.5/125 fibre optic
plant wide. None of the runs between components are longer than 2km. We
intend to upgrade the technology from a proprietary communication
protocol to a standard ethernet protocol at 100 MHZ. The fibre to copper
convertors we will be using are using 1300nm light source and have a
Fibre Optic Link Budget of 12.8dB for 62.5/125 um and 9.8dB
for 50/125 um. The client has been advised to replace the multimode
62.5/125 with multimode 50/125 cabling and we need to know if this is
really a requirement.
A: Do you know
how old the fiber is? It should be what we called FDDI grade 62.5/125
fiber with a loss of ~1dB/km and a bandwidth of 500MHz-km at
1300nm. A 2km link should have a loss of 2dB for the fiber and
~0.5dB/connection - well under the power budget of the link. 100Mb/s
Ethernet variants were designed for 2km or more on this fiber. There is
no reason to upgrade at this time, 50/125 fiber would not be needed
until Gigabit Ethernet was desired.
Bi-Directional OTDR Testing
Q: Should the testing be done with the
same piece of equipment from both ends then merge the results or does
that not matter - can you use traces from two OTDRs as long as the test
equipment is compatible and settings are adjusted properly.
A: Yes, you
should use the same test set from each end but this way - take a trace,
disconnect the OTDR from the launch cable and go to the far end of the
receive cable and connect it there to take the second trace. The usual
way people do bi-directional tests is to disconnect the launch cable and
take it to the far end and shoot back up, often not using a receive
cable at all, figuring they get the far end connector on the second
test. But when you disconnect the launch cable (and/or the receive
cable) you lose the connection you want to test in the other direction!
As for using the same OTDR, every OTDR is different and the results you
get may be significantly different, esp. if they are not calibrated
recently - and few OTDRs are ever calibrated.
Tracing Fibers
Q: I’m looking for an inexpensive, but reliable
method to quickly and easily identify terminated and unterminated SM
and MM fiber, perhaps something similar to a tone and probe used for
copper cabling. For example, I found a unterminated coiled fiber
cable and would like to use it, but there are several unlabeled,
terminated and unterminated fiber cables at the other end. Is
there an inexpensive universal tool to simply and easily find the
cable/s I’m looking for?
A: Your best bet
is a visual fault locator (VFL) but you do not need a bare fiber
adapter, just a unterminated connector. You will need to strip the fiber
and preferably cleave it, but that can be done off the end of the
connector. Just scribe the fiber and pull straight away from the
connector. That should give a cleave good enough for using a VFL to
trace fibers.
 
Equipment Specified At 1310nm and 1300nm Compatible
Q: Can a switch or SFP module specified at 1310nm GBIC connect to another switch or SFP that has is specified at 1300nm GBIC?
A: No problem -
there is no material difference in 1300nm and 1310nm - it's just
jargon. The 1300/1310nm confusion has been part of fiber optics for 30
years. Basically, there is no real difference in the wavelengths except
for traditional nomenclature. The nomenclature evolved to this -
if you said 1310nm, it was assumed you were talking about lasers, but if
you said 1300nm, it was assumed you meant a LED!
Color Code For Hybrid Cables
Q: Is there a standard color code for the
jacketing of a hybrid all optical cable, one that has both single mode
and multimode optical fibers in it?
A: No, it
has to be spelled out on the cable. We could use a standard however. We
know plenty of people who got SM and MM confused in a hybrid cable.
Passive OLANs in Hotels And Resorts
Q: Are passive OLANs a good choice for hotels or resorts?
A: Passive
Optical LANs are enterprise networks based on fiber to the home (FTTH)
technology not Ethernet over structured cabling. The FTTH network is
usually using GPON standard equipment over one singlemode fiber with
passive optical splitters that provides basic Level 1 and 2 network
functionality. This is not Ethernet but carries Ethernet over the GPON
protocols at 2.5G downstream and 1.25G upstream.
Passive OLANs offer several advantages over conventional
Ethernet switches and structured cabling, including much less
cost (~50% capital expense and ~20% operating expense), much lower
space requirements (see the link to the library photos below and note
the two racks of equipment that support 4000 drops), longer distance
requirements (to 20km), easy expansion (these are systems designed for
hundreds of thousands of users) and easy management (when you have
hundreds of thousands of users, that’s important.)
For hotels, convention centers and similar facilities,
the ease of upgrading to a passive OLAN is a big advantage - one fiber
goes from the computer room to a splitter where it can serve 32 switches
of 4 ports each. That’s right, one fiber can support 128 users! It can
support anything that a network can - wireless access points, security
cameras, secure entry systems, VoIP phones or POTS phones - anything
that will run over a conventional network.
Equal Fiber Lengths in Duplex Links
Q: In a fibre system using separate cables for
receive and transmit, do the cables need to be the same length. Do the
patch leads need to be the same length?
A: The answer is
“no” within reason. Duplex signals are asynchronous by design so a
small difference should not cause problems. For some protocols, very
large differences might be a problem, but certainly not the small
differences in fibers in a cable or patch cord variations.
Even in a long OSP loose tube cable, there are
variations in the length of fibers, as much as +/-1%, because the fibers
are loose in the cable to prevent stress, so at 100km, the difference
could be significant. Networks allow for this.
Mixing OS1 and OS2 Fibers
Q: Can I splice OS2 pigtails to OS1 fiber?
A: OS1 and OS2
are identical geometrically (same core and clad size) but OS2 has been
processed to remove more OH+ (water ions) to reduce the attenuation at
the water peaks for use with coarse wavelength division multiplexing.
See http://www.thefoa.org/tech/ref/basic/fiber.html
There is no problem mixing them in a system because
other than the reduction of the water peaks, the fibers are the same and
can be joined with no excess loss.
Testing Attenuators
Q: How do I test an inline attenuator (receptacle on one end and connector on the other)?
A: Here is the procedure to test an attenuator:
This attenuator only works properly between two cables
to add attenuation so if you test directly connected to a power meter it
may not be correct. Here is how it is used:
————————————C-AAAAC=C——————————
Where C is a connector, -AAAAC is the attenuator with a
receptacle on the left and a connector on the right, and = is a separate
mating adapter or receptacle. C———————————C is a cable with connectors
on each end. Source- is a source and -Meter is a meter
Test it like this:
First measure the output of the source with a
cable as the “0dB” reference. Use at least a 2m cable and put a
50mm loop in the cable. Remember you need SC/APC connectors on the
cables mating to the attenuator.
Source-C——————50mm loop———————C -Meter
Attach the receptacle end of the attenuator to the
cable, then use a mating adapter to attach a second cable to the
attenuator. Attach the meter to the end of the second cable to measure
the loss.
Source-C——————50mm loop——————C-AAAAC=C————————————C-Meter
Be sure to put the loop into the cable attached to the
source. Be sure your two cables are low loss and everything is very
clean.
And here is the photo the person asking sent us when they did the test:
Calibrating An OLTS
Q: I have a question about the OLTS - do you have to recalibrate it every day ?
A: Any optical
loss test set needs to be calibrated for “0dB” whenever anything changes
- the launch cable - source output - or even every few tests to ensure
the connector is clean and undamaged - plus they wear out. See 5 different Ways To Test Fiber Optic Cables.
Index Of Refraction For Unknown Fibers
Q: I inherited some old fiber to characterize. How do I set the IOR in the OTDR?
A: The index of refraction is the spec the OTDR uses to calculate length. If you refer to the data sheets of fiber manufacturers like Corning (https://www.corning.com/media/worldwide/coc/documents/PI1463_07-14_English.pdf) and Prysmian (http://www.prysmiangroup.com/en/business_markets/markets/fibre/downloads/datasheets/SMF---Enhanced-Single-Mode-Optical-Fiber-ESMF.pdf)
you will find that G.652 fiber has similar index of refraction among
most manufacturers - 1.467 @1310nm, 1.468 at 1550/1625nm. If you do not
know what the index of refraction is, using those is probably a very
good estimate. Remember the measured length of fiber will be ~1% longer
than the cable and you may have ~1% uncertainty in the instrument
measuring length.
Insertion Loss
Q: I have not been able to find a good definition of “optical insertion loss” or “insertion loss” or “optical loss.”
A: Insertion
loss was the term originally used for the loss of a connector tested by a
manufacturer. They would set up a source and length of fiber connected
to a meter, measure power, insert a pair of connectors and measure the
loss. Since it was an inserted connection, it became known as insertion
loss.
Over time, the term insertion loss became more widely
used to contrast with the loss measured by the OTDR, an indirect
measurement using backscatter that may not agree with the loss with a
light source and power meter.
Insertion loss, therefore migrated to meaning a loss
measured of a cable or cable plant inserted between the launch and
receive cables attached to a light source and power meter for double
ended testing used with installed cable plants. For patch cord testing,
you do not use a receive cable attached to the power meter but connect
it directly to the cable under test, making the test just include the
one connection to the launch cable.
Two other terms often mixed up are attenuation and loss,
which are essentially the same, except when discussing a fiber. In
fibers, attenuation is often used instead of attenuation coefficient.
Attenuation is the absolute loss i dB while attenuation coefficient is
the characteristic attenuation of a fiber expressed in dB/km.
Here is probably the best explanations: http://www.thefoa.org/tech/ref/basic/test.html
Adhesive/Polish Connectors
Q: If a connector is designed for heat cure epoxy adhesive, can I substitute anaerobic adhesive?
A: Any ceramic ferrule connector can be used with either heat-cure epoxy or anaerobic adhesives.
Old Fiber
Q: We are looking at a company’s fiber network
which has been laid at various points in time over numerous years.
In this process, we are trying to identify the changes that were made
to either/both the glass fiber and the cladding. Are there
different generations of what was industry standard in creating the
fiber? For example, are you able to identify the difference in a
fiber that was laid in 1980 versus one laid today? Was the
cladding the same size/thickness etc. in 1980 as it is today or has this
been modified/improved upon over the years? In all, we are trying
to find what modifications have been over the years and how this may
improve the life of the network and its capabilities.
A: This is a
common problem today. Many network operators are evaluating their fiber
networks for upgrades, hampered by the fact that few are properly
documented. Below is a timeline that should answer your questions. What
many network owners are doing now is testing their cable plants - a
process called Fiber Characterization. There are contractors who do this service.
Fiber Tech Timeline
1976 - First field trials, US and UK, using multimode fiber at 850nm
1980
- First long distance networks still using multimode fiber at 850nm,
planning to upgrade with wavelength-division multiplexing at 1310nm
1984
- singlemode fiber becomes feasible, telecom drops multimode fiber, all
future installations are singlemode - this first SM fiber with a 9
micron core and 125 micron cladding is still available today but with
better specifications. Really early fiber may not have good
environmental protection and degrades over time. Early speeds were
145-405Mb/s, up to 810Mb/s by the end of the decade.
1990
- around this time, modern fiber begins - better performance and
environmental protection. Fibers for wavelength-division multiplexing in
the 1500nm range appear allowing multiple signals on a single fiber and
fiber amplifiers allow long spans.
1995-2000
- massive build-out of fiber backbone leads to glut of fiber - WSJ
~2001 says 93% of all fiber is dark. Speeds grew from 1.2-10Gb/s over
the 90s decade
2000-date
- massive Internet growth and mobile device growth eats up glut of
fiber and demands many times more. Dense wavelength-division
multiplexing becomes the norm. Speeds began at 1.2/2.5Gb/s, upped to 10,
40 and are now at 100Gb/s.
So most fiber installed after 1990 has the possibility
of being used at 10Gb/s, after 2000, it’s probably OK for 40Gb, and
since 2010, you are probably OK for 100G and maybe more. To verify
performance, you test each fiber for connector condition, loss,
spectral attenuation, chromatic dispersion and polarization mode
dispersion. There are test sets that will do Fiber Characterization in basically one step.
Splicing The Right Fibers
Q: I have been given a job that will require me
to cut an existing 6 count cable in two and splice in a new piece. My
problem is that this cable was installed in 1987. From what I have been
told there is a good possibility that this cable does not follow present
day color codes. Rumor has it that this cable has 3 pairs of Red/White
fibers. I was wondering if those pairs are separated by a string or
what? Otherwise I will be guessing as to what fiber I am working on. Any
information you have on this old fiber type would be greatly
appreciated.
A: Color coding for optical cables is unpredictable except for the 1-12 color codes adopted from electrical standards.
I suggest you head to one end of this cable or the other
and look at the ends where it’s terminated - you may be able to see how
it’s color-coded there. If not, you have two ways to identify fibers
other than color coding. 1. Use a visual fault locator if the cable is
short enough from the end to the splice point - about 4-5 km is the max.
2. There is a gadget called a fiber identifier that can clip on a fiber
and see if there is traffic or 2kHz tone from a test source. Both
instruments are described here: Fiber Optic Test Instruments http://www.thefoa.org/tech/ref/testing/Instruments/instr.html
Ethernet Switches In A Passive OLAN
Q: I’ve design a POL (passive optical LAN) for a
39 level building for renting office area to enterprises. The owner
will provide “ONTs” to office area where the renters should prepare
network switches by themselves. Two questions pop up in my mind:
1. If the renter buys an
Ethernet switch, can this switch be directly pugged onto POL’s fiber
terminals?
2. Or this L2 should be plugged onto ONT of POL?
A: If I
understand the question correctly, you are asking if you can connect a
L2 switch with an Ethernet port directly to a OLT. If the OLT uses GPON
and does not have Ethernet ports, the answer should be no, GPON and
Ethernet are not compatible so the Ethernet switches should be connected
to the Ethernet ports on the ONT.
Fusion Splicing Live Fibers
Q: Is it safe to fusion splice a live fiber, or is there a chance that
the light from the arc will damage the detectors in the modules at the end (20km-rated SM for us).
A: I have never
heard of this being a problem. The amount of light coupled into the
fiber from the splicing would be very small compared to a properly
coupled laser. When a cable is broken you might be splicing the fibers
that are live without knowing which are live and not caring. On your
newer splicers this is not a problem. On the older splicers with the LID
system you would have to reduce the power to get a good splice which
they would do by putting a bend in the Fiber.
Estimating
Q: I need a source for estimating the cost of
fiber optic cable installations. Direct buried, in PVC pipe, Jetting
into existing pipe, etc.
A: FOA has a tutorial on estimating fiber optics here: Estimating Fiber Optic Installations
If you are looking for a consultant to do the estimates,
I suggest contacting a local contractor, distributor or consultant who
can do estimates.
Armored Cable In Conduit
Q: We will be pulling inside of an underground
2" plastic conduit a 144 Strand OSP corrugated armored (coated steel
tape) fiber cable Corning 144EUC-T4101D20. The client is asking what we
are going to pull along with the fiber to allow - if it is needed in the
future- to locate the fiber. Does an additional cable (like
tracer wire) need to be pulled if the fiber has already the coated steel
tape ?
A: It is very
unusual to pull armored cable in conduit - that’s usually a
direct-buried cable laid into trenches or plowed in. The heavy weight
will make for a lot of friction and may create problems pulling the
cable. The armor on the cable should be suitable for later cable
location. It’s conductive and would be detectable with many locators.
Upgrade Systems But Still Use 100/140 Fiber
Q: If someone has fibre infrastructure based on
100/140um cable and wants to maintain the cable but update the
components on either end….. Do you know of a company who has some
sort of converter / adaptor for this type of application?
A: 100/140 was
replaced by 62.5/125 fiber in the mid 80s after IBM used it on the 3044
Channel Extender (we helped IBM on that project.) Everybody was
scrambling to see if their equipment designed for 100/140 would work on
62.5/125 fiber - and it worked just fine.
The larger fiber gather more light from the LED source
so it starts with more power and even if it loses a little at the
receiver from a small detector, the result is about the same. I suspect
the same is true for today’s equipment.
What you do not want to do is mix fiber types - there is
a substantial loss with the joining of 100/140 to 62.5/125 - see
Mismatched Multimode Fiber Losses Just make sure the patch cords
connecting the equipment are also 100/140 fiber.
Safety Of Underground Fibre Cables
Q. The local phone company has approached me as
property owner, as they would like to lay fibre optic cables on my
property. I have been doing some research in an attempt to establish the
health risks involved with using fibre optics more especially as I have
minor children and the cables if laid, will run along (underground -
not sure how deep though) my pool area where the kids play. Are you
perhaps able to furnish me with information regarding the exact health
risks involved - short term and long term please?
A: Fiber optic
cable is made from common plastics like polyethylene (PE) or polyvinyl
chloride (PVC) which is considered safe and used in many household
products. The fiber inside the cable is made of glass, Hava purer form
of the glass you use all the time. There is no electrical current
flowing, so there is no danger of electrocution or exposure to
electromagnetic radiation. The light is not very strong and most systems
shut off if the cable has been cut. Cables are buried over 1m under the
ground and the trench for the cable is usually filled with gravel or
cement. For most homeowners the biggest problem is the destruction of
their lawn or garden during construction, but cable owners are usually
very good at fixing the problems and/or compensating the homeowner.
Duplex Communications Over One Fiber
Q: Is true duplex over a single fiber possible,
or is more like a shared time-domain technique in a quasi-duplex mode? I
would guess that true duplex would lead to interference problems.
A. Bidirectional
links are widely used - that’s how FTTH PONs work. They use splitters
to combine/split the signals and one wavelength downstream and another
upstream. See Fiber Optic Datalinks and for FTTH FTTH Architectures.
Power Wires In Fiber Cable?
Q: I would like to inquire if there is a fibre cable combine with electrical cable to carry both data and AC/DC voltage?
A: Many cable
manufacturers make so-called “composite” or “hybrid” cables that include
fiber an copper conductors. For example, a cable like that is used for
fiber to the antenna (see Fiber to the Antenna (FTTA)). Contact your local cable providers.
Passive OLANs For Hotels?
Q: I would Like your opinion on a project I
am pursuing at one of my customers, a Hotel ,where the
copper analogue lines for the telephone are aging "about 30 yrs."
we would like to replace them with a PON ,and also be able to push other
services over the new cabling, could you give me the names of
some PON equipment manufacturers?
A: Great
opportunity for the Optical LAN. Then your customer is future
proofed and with unlimited bandwidth and an almost empty Telecom closet.
Tellabs, Zhone and Calix are doing hotel installations. It’s even been
done in India - see this.
Using Hybrid 2.5-1.25mm Connector Mating Adapters
Q. Can I use the hybrid 2.5-1.25mm
adapters for connecting SC connectors to LCs or MU connectors. It would
make testing much more convenient.
A: We do not
recommend them for most uses, especially testing, as they can be highly
unreliable. Reserve them for emergencies and use hybrid patch cords
instead.
Test MM Fiber @ 1300nm?
Q: What
is your opinion about the need for testing at 1300 nm on OM3 and OM4
fiber especially now that bend insensitive multimode fiber is taking
over?
A: It’s
unnecessary and costly. It’s rooted in the FDDI/100M days 25 years ago
when 1300 LEDs were used and is now obsolete. The only actual uses at
1300nm I know are the extremely rare systems using 1310 lasers which may
be standards but simply don’t seem to ever be used. As you say, BI
fiber makes the issue of finding stresses moot.
Index Matching Gel In Connectors And Splices
Q: I would like to know if anyone has heard of
or knows of any issues pertaining to the Index Matching Gel in
prepolished splice connectors or mechanical splices getting cloudy over
5-7 years and failing?
A: We have not heard of any problems with the
index matching gel failing over time. That gel is usually a silicone
compound that is highly stable and even if it were to cloud there is
only a few microns between the fiber ends, hardly enough to cause a
problem. There have been many papers written on this topic and long term
tests by manufacturers that show no problems.
Fiber In Service Loops
Q: We designing a rural utility system that
will be expanded to FTTH (or FTTR - fiber to the ranch in this case).
We're wondering how much excess fiber in service loops to add. One
software package is asking for 12% but that seems excess.
A: I
have typically seen 100 feet on straight through boxes (reserves),
35-50 feet on cut ends for splicing and anywhere from 15-25 feet at the
premise depending on how much is required for the termination device,
positioning, etc. When rough estimating we have typically used 10% over
linear distance.
Cable For High Or Low Temperatures
Q: When manufacturers specify cable for -30 -
+70 deg C, are they talking operating or just installation temperature
for handling? Here the temperature can go as low as -70 deg C.
A: The
manufacturer will specify a temperature range for the cable environment,
but the usual expectation is the install gets done in the summer when
it’s warmer. A plastic jacket at cold temperatures is very stiff and
hard to work with. Special cables for low temperatures are available. We
helped plan an install at Scott-Amundsen base at the South Pole during
the FOTEC days and they are able to get special cable from most
manufacturers to test. It worked well.
Maintenance of Fiber Networks
Q: Can you guide me how to prepare Optical Fiber Cable Annual Maintenance Proposal?
A: Basically,
the network needs to be installed properly, fully tested and everything
carefully documented. Then no routine maintenance is required. Most
problems with fiber optic networks occurs when techs are working with
it, e.g. damaging cables or getting connectors dirty when testing, so
leaving it alone is the best plan.
Electronic transmission equipment can be tested
anytime to ensure proper data transmission, but that does not involve
accessing the fiber.
We have several things which may be of help:
You Tube Video: FOA Lecture 39 Maintaining Fiber Optic Networks
Web page: Maintenance
I have 4 questions about OTDRs:
Q: What is dynamic range I read many time
but can’t understand yet, whether it is a range of losses can be
measured by OTDR for example if an OTDR has 45 dB dynamic range, it can
read the losses of point up to 45 dB or what it means.
A: I do not believe there is a standard
definition of dynamic range, but it is generally accepted to be the
highest loss of the longest cable where you can see the end of the
cable. That usually means using the longest test pulse and most
averaging and assuming the end of the cable has a significant
reflection.
Q: What is dead zone is it fixed in meters mean an OTDR cannot measure up to initial 5, 10 or 20 meter
A: The dead zone is a function of the pulse
width and speed of the OTDR amplifier. For most OTDRs it’s about 2-3
times the test pulse width.
Q: What Type of settings needed before launching a test
A: See FOA Lecture 18: OTDR Setup or the section "Modifying OTDR Setup Parameters For Best Test Results” in OTDR testing.
A: Basically you set up wavelength(s), test pulse width (long enough to
reach end of cable but short enough for best resolution), index of
refraction or group velocity (a function of the fiber type and
wavelength) and the number of averages (enough to mitigate noise but not
take too long)
Q: Reading a test with 1310nm and 1550nm - why values different for a same length of fiber.
A: The attenuation of the fiber will be
different at each wavelength and the index of refraction which is
different at each wavelength causes a difference in length. The OTDR
measures length by measuring time and then multiplying that by the speed
of light in the fiber (which is the inverse of the index of
refraction.)
The FOA page "Frequently Asked Questions About OTDRs" answers these questions and more.
Getting Old Cables Out Of Conduit
Q: How do you get old cables out of a conduit when they are stuck?
A: Usually we are concerned about reducing friction when pulling cables through conduit, but sometimes you need to get them out. Here is a page from American Polywater the leading lubricant company with advice on the subject.
Manufacturing Guide?
Q: Is there a guide published by FOA that
provides insight as to the process of fiber optic manufacturing? It's my
understanding that the guide stresses quality and controls to ensure
performance and reduce product loss?
A: We do have a guide for manufacturers. It is mostly aimed at communications systems and components manufacture. Here is a link to download it.
How Long Does Termination Take?
FOA received a request from a consultant recently
wondering if we had information on the termination times for fiber optic
cables. After some looking in our archives, we realized we had a
document online that compared times for various fiber optic termination
processes. The paper was written after several FOA instructors did a
comprehensive time and motion study on termination processes. The
document is about 15 years old but still relevant.
You can read it here in the FOA Online Guide.
Testing Connectors (From A Patchcord Maker)
Q: What are the chief defining standard(s) that
specifies connector and assembly IL (insertion loss) and RL (return
loss or reflectance) for both SM and MM fiber?
A: The description on our Guide is here: http://www.thefoa.org/tech/ref/testing/test/conntest.html
FOTP-34 covers connector testing as a qualification test
for the type of connector - basically a "destructive" test for
connector manufacturers.
Reflectance is described on that page and here also: http://www.thefoa.org/tech/ref/testing/test/reflectance.html
Testing an assembly like a patchcord is covered under FOTP-107 http://www.thefoa.org/tech/ref/testing/test/FOTP-171.html
Basic Tests For Fiber Optic Cable Plants
Q: I did some research and I noticed that there
is a bunch of tests that can be done to fiber optics and I was
wondering if there is a list of primary tests that can be done as a
basic test.
A: Fiber optic testing does have a hierarchy of tests.
- At
the top of the list is "insertion loss" testing which uses a light
source and power meter to test the fibers in the same way that a
communications system transmits over the fiber. It is a simple test and
the equipment needed is inexpensive.
- Techs will also use a microscope to inspect the fiber optic connectors for dirt and damage, a big issue for fiber.
- The
instrument called an "OTDR" takes a snapshot of the fiber using a
technique like radar. Most outside plant cables are tested with an OTDR
and the data ( the snapshots are called "traces") stored for future
reference. OTDRs are more expensive and require more training to use
properly.
Here is a link to a page on the FOA Guide site that explains the technical,details: http://thefoa.org/tech/ref/testing/test/OFSTP-14.html
FOA also has information just for users of fiber optic networks, see http://thefoa.org/tech/guides/UG3.pdf
How to Clean POF (plastic optical fiber)
Q: I
heard that plastic fibres such as PMMA can suffer damage from cleaning
from an alcohol solution. Are there alternate cleaning solutions
available for these types of fibres."
A: You can use a 10/90 mix of isopropyl alcohol/water. Typically use with a lint free swab. (from out POF consultants)
Testing Bare Fibers With OTDR
Q: We are starting to test some OPGW cables. We
have an OTDR but we don’t find some reusable connectors. If we have to
test an OPGW with 48 fibres, we can’t set up 48 SC connectors!
Are there some reusable connectors in the commerce?
A: I assume you
mean you need to test with a bare fiber on the OPGW. For testing bare
fiber, use a splice, not a connector. Have a long pigtail on the OTDR as
a launch cable, long enough for the test pulse to settle, say 100-500m,
then use a splice for a temporary connection. You can fusion splice the
fibers then cut the splice out or use a removable splice like the
Corning Camsplice
(http://catalog.corning.com/opcomm/en-US/catalog/ProductDetails.aspx?cid=&pid=17929&vid=18219)
If you use a mechanical splice, you need a high quality
cleaver just like with fusion splicing and after several uses, you need
to add more index matching gel or liquid - mineral oil works OK. See the FOA page on Testing Bare Fiber.
Is A Flashlight Test Adequate?
Q: I
contracted a firm to install an OM3 of 200 meters. On one end I
have an SFP 1000SX ,on the other a 1000SX converter from optical to UTP.
We made pings but they never reached, and I didn’t see the laser at the
extreme of the fiber. They promised me to send me the certification
they supposely made ,though they assured me the fiber is ok,
because WITH A FLASHLIGHT THEY SENT WHITE LIGHT FROM ONE SIDE TO
THE OTHER AND IT WAS VISIBLE. I saw the light too, and I thought the
culprit was my switch or my SFP. I want to know: is this a good
demonstration that the fiber is ok?
A: A visual
continuity test is not adequate - your eye is not calibrated! The power
of the lamp is unimportant as each eye’s sensitivity is different. And
your eye probably cannot see the light from a 850nm VCSEL source - most
people’s eyes are not sensitive at that infrared wavelength. The
installer should have tested the link with a light source and power
meter (http://www.thefoa.org/tech/ref/testing/test/OFSTP-14.html)
and given you the loss in dB. The connectors should also be inspected
with a microscope to ensure proper polishing and cleanliness
(http://www.thefoa.org/tech/ref/testing/test/scope.html). If the SFP
output is -6dBm, what is the power at the receiver? 1000base-SX is
supposed to work with 4.5dB loss (see
http://www.thefoa.org/tech/Linkspec.htm). The fiber loss should be ~0.6
dB, so you must have >4dB connector losses! That says bad
installation! The 1000SX link should work over 200m if the fiber has
been properly installed.
Older Fiber?
Q: I have some 62.5 mm and sm inside fiber plant over 20 years old. When is a good time to upgrade?
A: When you need to or have to. If it's working OK, there is no need to upgrade!
"Connector Loss" or "Connection Loss"
Q: I have always counted the loss of a connector as .75 dB (568B-3) and 1.5 for a mated pair. Is that correct?
A: While the
industry always says "connector" loss, it is actually "connection" loss.
As we explain in the page on termination and splicing (http://www.thefoa.org/tech/ref/basic/term.html)
When we say "connector" loss, we really mean "connection" loss - the
loss of a mated pair of connectors, expressed in "dB." Thus, testing
connectors requires mating them to reference connectors which must be
high quality connectors themselves to not adversely affect the measured
loss when mated to an unknown connector. This is an important point
often not fully explained. In order to measure the loss of the
connectors you must mate them to a similar, known good, connector. When a
connector being tested is mated to several different connectors, it may
have different losses, because those losses are dependent on the
reference connector it is mated to."
The TIA spec of 0.75dB is for a mated pair of connectors. If you have
been passing connectors tested @ 1.5dB loss....you may have some very
bad connectors in your cabling!
Microscope Magnification (11/13)
Q: I am doing a lot of fiber optic jumpers for
control systems, either single mode or multimode. I want to get a
scope to inspect the ends after I clean them would you recommend a
200X, 400X handheld or one similar to a Noyes OFS 300 200C?
A: We prefer to
use lower magnification and have a wider view so I can see more of the
ferrule to determine its condition. You can see the fiber effectively at
100X but 200X may be better. 400X may be too much for most tasks like
inspecting for cleanliness, but may be good if you are polishing SM for
good reflectance. We've used the Westover units for years because they
offer two different methods of illumination - direct and at an angle. If
you are doing a lot of patchcords, I recommend a video microscope. I've
used the Noyes unit that interfaces to a PC to create the FOA
Microscope Inspection YouTube video here: http://www.youtube.com/watch?v=IyumH8CiUPQ&feature=youtu.be and it works well.
Recycling Cabling
Q: Who can I contact regarding recycling cable I am removing from a building?
A: Here are some people who say they recycle fiber optic cable or at least know how to do it:
http://www.scottrecycling.com/complete.html
http://www.scrapmonster.com/selloffer/fiber-optic-cable/10400
http://www.dnvkema.com/services/ces/hse/recycling/recycling-cables.aspx
http://tmscrapmetals.com/Recycling.html
Tech Hint: Did You Know You Have A Fiber Optic Tester In Your Pocket?
Yes!
That old mobile phone has a camera which may be sensitive to infrared
light - lots more than your eye - and can detect light in an optical
fiber or from a transmitter. Chris Hillyer,CFOT/CFOS/I, Master
Instructor, Northern California Sound & Communication JATC sent us
some photos showing how this works. See below or the video now on YouTube.
Update: You should check out your old cell phones before you recycle
them. We've found older models use sensors which are better at infrared
than the newer ones which take better pictures. This is a good use for
your old cell phones hiding in the drawer!
Fiber Cleaning
This is a topic we keep reminding everybody about, and here is why:
From
a contrator in the Middle East: Here some samples of the connectors for
SM fiber already installed in the system we were testing.
 
As
you can see, the dirt is large compared to the size of the fiber (dark
gray), and the core (not visible here) is only 9/125 of the overall
diameter of the fiber!
Clean Every Connector - A Lesson We Learned From Creating Lessons
In creating the fiber characterization
curriculum, we got inputs from many experienced techs about the testing
requirements. Everyone we talked to made a big point about cleaning and
inspecting connectors before testing. Dirty connectors are a major
problem with errors in testing. We've also seen that many installers
think that if a connector, especially new connectors, has a "dust cap"
on the connector, it does not need cleaning. WRONG!
The common name for the plastic caps on connector ferrules is "dust cap" and a friend says they are called "dust caps" because they are full of dust.
Those plastic caps are made by the millions, popped out of plastic
molding machines into barrels and stored until put into plastic bags.
Whenever you remove one of them, clean the connector before testing or
connecting it.
More on connector cleaning is here and here.
More on cleaning. See Product News below for links to vendors of fiber cleaning products.
What You Need To Know About Fiber Optic Cleaning And More
Ed
Forrest, one of the industry experts on cleaning fiber optic
connectors, retired about a year ago. We encouraged him to put down on
paper what he knew about fiber cleaning and he took our advice. He's now
created 4 books on cleaning topics that cover just about everything you
need to know. And he added another volume that's also important -
maintaining fusion splicers. We recommend these books highly.
How to Precision Clean All Fiber Optic Connections
Understanding Cross-Contamination Points on Fiber Optic Inspection & Test Equipment
Maintaining a Fiber Optic Fusion Splicer
Comparison Study of Precision Cleaning Methods for All Fiber Optic Connection
Whitepaper: The Significance to Optical Internconnect: Properly Cleaning a Fiber Optic Connection
Information on Ed's books is at http://fiberopticprecisioncleaning.com/available-books-whitepapers/.
See news about Fiber Optic Cleaning Videos on YouTube by ITW Chemtronics below.
Fiber Optic Cleaning Videos on YouTube
See news about Fiber Optic Cleaning Videos on YouTube by ITW Chemtronics three fiber optic cleaning videos on YouTUbe covering Dry Cleaning, Wet-Dry Method, FiberWash and Combination Cleaning. They are good explanations of cleaning processes - the Wet-Dry is especially interesting.
- Westover Application Notes And Cleaning Video
- Westover
has several application notes on inspecting and cleaning fiber optic
connectors. The video is a big file (50+MB) but a good tutorial.
- Download page: http://www.westoverfiber.com/Support/downloads.php
-
Measurement
Uncertainty: Everyone testing fiber optics should understand that every
measurement has some uncertainty - whether you are measuring loss,
length, wavelength, power, etc. Knowing that uncertainty is very
important to interpreting the measurement. It's worthwhile to read and
understand the issue of measurement accuracy covered in this page of the FOA Online Fiber Optic Reference Guide.
RETURN TO INDEX
Worth Reading or Watching:
Sign up at the FOA Pinterest board
FOA "Quickstart Guides"
In
our continuing quest to help people understand how to test fiber optic
cable plants and communications systems, we've created two more
"QuickStart Guides to Fiber Optic Testing." They are simple,
step-by-step guides on how to test fiber optic cable plants, patchcords
or single cables using insertion loss or OTDR techniques and optical
power from transceivers. It's as straightforward as it can get - what
equipment do you need, what are the procedures for testing, options in
implementing the test, measurement errors and documenting the results.
It can't get much simpler.
Send anybody you know who needs to know about fiber optic testing here to learn how it's done in a few minutes.
Testing Fiber Optic Cable Plants And Patchcords
Testing Fiber Optic Cable Plants With An OTDR
Measuring Optical Power In Communications Systems
New Edition Of Eric Pearson's Fiber Optic "Cookbook"
Eric Pearson of Pearson Technologies Inc. announced the availability of Professional Fiber Optic Installation, v.9.
This recently updated training, field, and reference text is a
comprehensive presentation of the information essential to successful
fiber optic installation. This
text assists the installer in achieving the three elements of success:
low power loss, high reliability, and low installation cost. This text
is the ideal tool for three types: those who wish to become professional
fiber optic installers; for instructors who want to use the most
comprehensive training manual available; and for those who want to pass
the Fiber Optic Association CFOT and CFOS/C/S/T certification
examinations. Continuously developed and tested over the last 24 years
during both fieldwork and training presentations, this text includes
both the information essential to understand the reasons for the
installation rules and detailed procedures for installation, inspection,
certification, and testing of cables, connectors, and splices.
The new edition, #9, is available on Amazon.com.
Like Crossword Puzzles? Here's Some On Fiber Optics
Do
you like crossword puzzles? How about one on fiber optics - or maybe a
half-dozen of them? FOA Master Instructor Eric Pearson of Pearson Technologies has created a series of crossword puzzles on fiber optics that are keyed to the FOA CFOT reference materials and his book Professional Fiber Optic Installation, v.9. You can have fun and study fiber optics at the same time!
This months crossword puzzle is on "Optoelectronics and Splicing" - Download the crossword puzzle on "Optoelectronics and Splicing."
If you missed the earlier puzzles, here they are:
Download the PDF file of the crossword on "Light and Fiber".
Download the PDF file of the crossword puzzle on "Cables".
Download the crossword on "Connectors & Splices."
Older Fiber, Do You Know How Good It Is?
There's
millions of miles of long distance fiber installed around the world and
most of it likely to see an upgrade of the systems operating on it,
probably in the near future. Twenty years ago, most of it was probably
running at ~1Gb/s, ten years ago it was probably 2.5 Gb/s, recently it
was likely to be 10Gb/s but now many are being considered for 100Gb/s or
beyond. Can the fiber support such speeds? Can it be "repaired" or
"modified" to make it possible to use it at higher speeds? If you own
that fiber, can you say what it is worth without knowing its future
upgrade capability.
In order to know the potential for upgrades on your
cable plant, you need to test it. This process involves a number of
tests and is called "fiber characterization." Greg Stearns of TTP-US, an
FOA Corporate Member, performs these tests and has written a short
article on why you need to characterize fiber and how its done. Read
about fiber characterization from someone who does it often and can
explain it well.
Download the paper here (PDF, 80kB).
Demystifying Singlemode Fiber Types
Singlemode
fiber has a lot of names and users are confused by the different names
depending on the standards organization you refer to IEC, ITU or TIA
designation. Most widely used are the ITU G65X designations but even
there we find many designations. Shaun Trezise of M2FX has posted a
simple explanation on the company blog that helps explain the different
types and where they are used. Read more on the M2FX blog
There is a cross reference to the IEC, ITU and TIA designations on the FOA Guide.
NEXANS FTTO Guide
NEXANS
UK has published a FAQ guide explaining the benefits of a "Fibre To The
Office" (FTTO) solution as an alternative to traditional structured
cabling installations.
Download the guide here.
Want to keep up with gigabit FTTH, try reading or subscribe to the GigCommunities Newsletter.
EXFO Offers Super Posters And More
EXFO offers some super posters, guides and books. The FTTx and OTDR posters are really useful! Look at the whole selection here.
Getting Cables Out Of Conduit
Usually we are concerned about reducing friction when
pulling cables through conduit, but sometimes you need to get them out. Here is a page from American Polywater the leading lubricant company with advice on the subject.
What Is The FOA?
Hear FOA President Jim Hayes tell the FOA Story in a
2-part interview by Sound & Video Contractor Contributing Editor
Bennett Liles. It tells about the FOA history, goals and achievements.
Part 1: http://svconline.com/podcasts/audio/fiber_optic_association_part1/index.html.
Part 2 http://svconline.com/podcasts/audio/inside-fiber-optic-association2-0924/index.html.
New Textbook On Cleaning Fiber Optic Connectors
As fiber optic networks become faster and link margins
lower, cleaning fiber optic connectors has become more critical. Now
there is a book that gives really good information on cleaning from a
real expert.
Ed Forrest retired from ITW Chemtronics recently after
many years of being their expert on cleaning fiber optic connectors. Ed
has been one of our best contacts on the subject because his knowledge
is both broad and deep. When he retired, we suggested he write a book on
fiber optic cleaning and he took our advice.
Ed's book is like a cookbook, looking at specific
cleaning recipes, plus evaluating the tools commonly used for cleaning.
It's also in color which makes it easier to see what is being done,
although it makes the book a bit more expensive.
Now you can buy The Need to Precision Clean Fiber All Optic Connections,
A study of the 'sciences of cleaning', contemporary cleaning products,
methods and procedures by Edward J Forrest Jr. The book is available
online from CreateSpace, the same publisher FOA uses. Go here for more
information on the book: https://www.createspace.com/5120367
What Happens To Old Fibers?
In a recent web search, we found this article from
Corning, reprinted from a IWCS presentation in 1995. It discusses
extensive tests on a 1984 cable installed in the northern US to see how
it had degraded in almost 10 years. It is interesting to see how the
fiber survived OSP exposure. Read it here.
Australia's Standard Is Comprehensive Guide To Customer Cabling (Get your copy free)
In
answering a recent technical questino, Trevor Conquest in Australia
pointed to the Australian Standard "Installation Requirements For
Customer Cabling." When we checked, it is on the web and can be
downloaded. It's a big book - 220 pages - full of details for fiber and
copper installations. We recommend you download yourself a copy - go here.
Demystify fiber inspection probe technical specifications - From EXFO
The
intent of this application note is to promote a better understanding of
video inspection probe specifications and features. Properly
understanding the key specifications and features will greatly
facilitate the decision process involved in acquiring such devices.
Understanding the key aspects of fiber inspection probes will also help
users understand how fiber inspection probes operate, thus enabling them
to maximize the full potential of these devices. Read more.
Where In The US Do Contractors Need Licenses For Fiber Optics?
We
often get asked where in the US do contractors doing fiber optic
installations need licenses. We found a good website for that
information, the NECA -NEIS website. You might remember NECA-EIS, as
they are the partner with the FOA in the NECA/FOA 301 Fiber Optic
Installation Standard. NECA is the National Electrical Contractors
Association and NEIS stands for National Electrical Installation
Standards. They have a very easy to use map and table that gives you
data on every state in the US, so mark these pages for future reference.
NECA/NEIS
http://www.neca-neis.org (See “State Regulations”)
http://www.neca-neis.org/state/index.cfm?fa=state_regs (all electrical licensing)
Low Voltage: http://www.neca-neis.org/state/index.cfm?fa=specialty_licensing
How Is Fiber Manufactured?
OFS invites you on a tour of their multimode fiber
manufacturing facilities in this new 5-minute video. You will see their
highly automated manufacturing operation in Sturbridge, Mass., including
their patented MCVD preform fabrication process to fiber draw and final
product testing. With a technological heritage dating back to AT&T
and Bell Labs, OFS has been manufacturing high-quality multimode fiber
since 1981.
Watch the video here.
Interesting Video On Directional Drilling For Fiber Optic Cable Installation
CI&M magazine has posted an interesting video about
how Time Warner Cable installs underground fiber optic cable by
directional boring. It's a good look at how directional boring works. Watch it here on CI&M's website.
CI&M Editor also does a good review of alternative
cable installation methods in an article on the magazine website. Read it here.
Want To Know Where Submarine Fiber Optic Cables Run?
There is a good map online by TeleGeography you can access here.
Benchmarking Fusion Splicing And Selecting Singlemode Fiber
We've been asked many times "How long does it take to
splice a cable?" It's not a simple answer as it varies with the number
of fibers in the cable and the work setup, including whether one or two
techs are working at a job site. FOA Master Instructor Joe Botha of
Triple Play in South Africa did his own analysis based on decades of
experience both splicing cables and teaching others how to do it
properly. This is one of the best analyses we have seen because Joe
includes prep times as well as splicing times and differentiates between
one tech and two techs working together. He adds some other tips on
fusion splicing too. This should be mandatory reading for every tech and
given to every student! Here is Joe's splicing analysis.
Joe also has an excellent writeup on how to choose singlemode fiber that helps understanding the different types of G.6xx fiber. Read it here.
And you will want to read Joe's report on splicing different types of SM fiber, including bend-insensitive (G.657) fiber. Read it here.
Free - Mike Holt's Explanation Of The US National Electrical Code (NEC) For Communications Cables
Mike
Holt is the acknowledged expert of the US National Electrical Code
(NEC). His books and seminars are highly praised for their ability to
make a very complicated standard (that is in fact Code - law - in most
areas of the US) easily understood. Part of the appeal is Mike's great
drawings that make understanding so much easier. Mike makes Chapter 8 of
his book available free. It covers communications cables, telephones,
LANs, CATV and CCTV, for premises applications. Even if you live in a
region or country where the NEC is not the law, you may find this
interesting.
Download Mike's Chapter Here.
Fiber Optic Cleaning Videos on YouTube
ITW Chemtronics has three fiber optic cleaning videos on covering Dry Cleaning, Wet-Dry Method, FiberWash and Combination Cleaning. They are good explanations of cleaning processes - the Wet-Dry is especially interesting.
A Documentary Treasure on the History of the Internet
15
minutes of a rarely-seen BBC documentary demolish the myth that ARPAnet
was inspired by nuclear war, and explain the far more intriguing truth.
http://www.technologyreview.com/blog/mimssbits/26719/?nlid=4433
-
- Download yourself a copy and read it!
-
Good Technical Website For Installers
American Polywater (http://www.polywater.com/) has one of the best technical website for cable installers. Check out their website, especially “Videos,” “Engineer’s Corner” and “Calculators.” http://www.polywater.com/NNNBSL.pdf
Fiber Optic Safety Poster
We've had numerous requests to reprint our guidelines on safety
when working with fiber optics, so we have created a "Safety Poster"
for you to print and post in your classroom, worksite, etc. We suggest
giving a copy to every student and installer.
RETURN TO INDEX
" Heard on the Street" is a monthly online newsletter
from Frank Bisbee of Communications Planning Corporation that
covers the telecommunications and cabling businesses. Each month
includes news from manufacturers, trade associations and professional
societies like the FOA. You can read the current issue and back issues
online.
IGI, a major market research and technology reporting
company (the "Active Optical Cables" below) is offering a a free
one year subscription to one of our fiber optics newsletters to FOA
members. All they have to do is to send IGI an e-mail stating
which newsletter they would like to get. See http://www.igigroup.com/nl.html for a listing of IGI Newsletters.
RETURN TO INDEX
-
FOA Tech Topics -
A Fiber Optic Tester In Your Pocket? (See the video on )
Yes!
The camera in your old cell phone is sensitive to infrared light - lots
more than your eye - and can detect light in an optical fiber or from a
transmitter. Chris Hillyer,CFOT/CFOS/I, Master Instructor,
Northern California Sound & Communication JATC brought this to our
attention.
 
If
you have an old cell phone, try it. Our experience is that older cell
phone cameras have better sensitivity at IR wavelengths than newer
phones, so you may want to toss that old flip phone into the toolbox.
RETURN TO INDEX
Product News
3M FTTH Drop Cable
A
new 3M drop cable for FTTH has a 90 micron buffered fiber inside to
allow more rugged terminations directly on the fiber. It's part of the "ClearTrack System" for easier FTTH installs.
YOKOGAWA OTDR Has Extended range, High Resolution And Multitasking
One OTDR manufacturer you don't hear as much about is
YOKOGAWA (formerly ANDO) which is too bad - they make some of the best
OTDRs, exemplified by this new model AQ7280. Need long range - how about
50dB. High resolution - 0.6m dead zone. Like touch screens, but for
some functions want hard buttons, it's got that. Options for VFL,
microscope, light source and power meter, etc. - it has that too.
But the unique aspect of the YOKOGAWA AQ7280 is it
offers multitasking - you can let do a trace with long averages while
you inspect connectors, make power readings, use the VFL or other
functions.
More info on the YOKOGAWA AQ7280.
FOA thanks Yokogawa for a gift of an OTDR to use for R&D and teaching!
Recycling Communications Cable
FOA was contacted by a company that recycles electronics communications equipment and cabling. CommuniCom recycles cable/metals/e-waste
for Telcos and CATVs. They also recycle Fiber Optic Cable and
associated Materials (the fiber scrap). And, they reclaim OSP abandoned
copper cables (abandoned from road moves or FTTx growth). This is a huge
part of our business. They do the work (permitting/locates/labor) for
free and we revenue share back with our clients (telcos).
Contact Steve Maginnis
smaginnis@communicominc.com
www.communicominc.com
803.371.5436 (cell)
Micro-Trenching, Cable Removal
Nano-Trench offers products for micro (or I guess they call it nano-) trenching and their website is very informative. They also have Kabel-X, a method of extracting copper cables from old conduit. Both websites are informative and interesting. Watch this video on the cable removal process!
Protecting Pedestals From Rodents
Pedestals
and underground vaults can be damaged by rodents who come up through
the base and damage cables. Uraseal "Drain N'Seal" foam deters mice from
taking up residence in your pedestals. They have some good videos on using their product.
Used Test Equipment – Buy or Sell
http://www.testequipmentconnection.com/
Have you read the FOA pages on cleaning?
- RETURN TO INDEX
FTTH Notes:
- Want To Learn More About FTTx? Try our free online self-study program at Fiber U.
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