Triple-Play Service Deployment

Chapter 3: Deploying and Troubleshooting Fiber Networks
Remote Test Systems and Clip-Ons
When the fiber link is not in service, a test access point easily can
be obtained by disconnecting the fiber.Transmission wavelengths
can be used for the test. For in-service testing or out-of service
testing without fiber disconnection, the operator can add a
specific network element that enables the test equipment to be
connected to the network. Out-of-transmission band wavelengths,
most commonly 1625 nm, are used for the test. Complete optical
network management systems (ONMS) are available to serve as
optical fault management tools.
The clip-on fiber identifier/power meter can be used to perform
tests at any location where the individual fibers can be accessed.
By slightly bending the fiber, the clip-on device provides an
indication of the directivity and the power level of the optical
signal. However, it becomes difficult to obtain an accurate
measurement when multiple wavelengths are transmitted over
the same fiber.
JDSU OTU-8000 Optical Test Unit for the ONMS Rack-based
optical test unit for RFTS (Remote Fiber Test System)
JDSU Clip-on Fiber Identifier
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