In this case, we need to determine how much light is lost over both line NW
and line NE paths. If the loss from going into the network link is within the
limits specified in the
Module and System Specification
, proceed to the next
step.
If the loss exceeds the limits, clean the OPPM connectors. If this does not
resolve the issue, return the OPPMto ADVA Optical Networking for repair.
Step 7 Use the measurements you have already taken to check the loss over the
GSM (Group Splitter Module). If no GSM is installed, please proceed to Step 8.
If this group contains multiple channels and only one channel exhibits power
levels which are not in specification, please proceed to Step 8, since the GSM
is probably not the root cause.
a) If the loss from the CSM N/M interface (or OPPM) to the GSM N/M
interface is within the limits indicated in the
Module and System
Specification
, then this GSM group is functioning correctly. Note,
however, that you need to measure the loss across the same group which
is experiencing poor power measurements.
b) If the loss across the GSM is too high, despite all attempts to clean its
interfaces, return it to ADVA Optical Networking for repair.
If there is a power gain over the GSM, channels in another group may be
transmitting optical power through the system. Ensure only one channel is
present when measuring loss over the GSM.
Step 8 Use the measurements you have already taken to check the loss over the
2BSM (Band Splitter Module). If no 2BSM is installed, please proceed to Step
9.
If this group contains multiple channels and only one channel exhibits power
levels which are not in specification, please proceed to Step 9, since the
2BSMis probably not the root cause.
a) If the loss from the GSM N/M interface to the 2BSM N/M interface is
within the limits indicated in the
Module and System Specification
, then
this 2BSM is functioning correctly. Note, however, that you need to
measure the loss across the same group which is experiencing poor power
measurements.
b) If the loss across the 2BSM is too high, despite all attempts to clean its
interfaces, return it to ADVA Optical Networking for repair.
If there is a power gain over the 2BSM, channels in another group/band
may be transmitting optical power through the system. Ensure only one
channel is present when measuring loss over the 2BSM.
Step 9 Use the measurements you have already taken to check the loss over the
CLSM (C-band/L-band Splitter Module). If no CLSM is installed, please
proceed to Step 10.
If multiple channels are running over the C band and/or the L band, and only
one channel exhibits power levels which are not in specification, please
proceed to Step 10, since the CLSM is probably not the root cause,
a) If the loss from the 2BSM N/M interface to the CLSM N/M interface is
within the limits indicated in the
Module and System Specification
, then
this CLSM is functioning properly. Note, however, that you need to
measure the loss across the same band which is experiencing poor power
measurements.
b) If the loss across the CLSM is too high, despite all attempts to clean its
interfaces, return it to ADVA Optical Networking for repair.
FSP 3000R7 Maintenance and Troubleshooting Manual - Product Release 16.2 - Document Issue A 55
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