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Hardware diagnostic tools consist of:
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Test equipment
To facilitate the troubleshooting of the Fiber Remote Multi-IPE Interface
and the fiber-optic link, it is recommended to have on-hand an optical
power meter (Fotec Model M712A or equivalent) to test the signal level of
the optical transmitter and the signal level received over the fiber-optic link.
Receiver sensitivity limit of -30 dBm can be measured. An adjustable
fiber-optic attenuator can be used to test the sensitivity of the optical
receiver. The patchcords are used to connect the meter, the light source,
and to loopback the link or the Fiber Remote Multi-IPE Interface while
performing the tests. The loopback patchcords (provided with equipment)
should be attenuated by 15 dB for the single-mode and 10 dB for the
multi-mode fibers.
Troubleshooting the fiber-optic link
To identify the problem with the fiber-optic link, check the attenuation
across the entire link, the signal level at the receiver and the signal level
at the transmitter, as described in
fiber-optic link" (page
Procedure 35
Troubleshooting the fiber-optic link
Step
1
2
Copyright © 2007-2009 Nortel Networks
.
OTDR (Optical Time Domain Reflectometer), rent for occasional use
fiber identifier receiver
card self-tests
LED indicators
display codes
enable/disable switches
115).
Action
Unplug the connector at the receiver and using the power meter
measure the received power on the link and compare it with the
receiver signal level specification.
If the received power is low, test the optical patch panel
jumper. If the received power level is still too low, measure the
transmitter. Refer to
signal levels" (page
Measure the transmitter power level using a good patch cable
and the power meter.
Nortel Communication Server 1000
Fiber Remote Multi-IPE Interface Fundamentals
NN43021-556 03.01
11 May 2009
Procedure 35 "Troubleshooting the
Table 5 "Fiber-optic transmit and receive
32).
Diagnostic tools 115
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