Troubleshooting Access Type TDM Channel Modules
LED
Name
LED Colors Potential Cause Solution for Troubleshooting
Cx Off No Ch Interface
(Facility) provisioned on
that pluggable
transceiver.
1 Install an appropriate pluggable transceiver.
2 Provision the pluggable transceiver.
3 Enable the admin state - Configure the
pluggable transceiver admin state to “In
Service”.
4 Provision a Ch Interface (Facility) on the
pluggable transceiver.
5 Enable the Ch Interface (Facility) admin
state - Configure the Ch Interface (Facility)
admin state to “In Service”.
Ch Interface (Facility)
admin state is disabled.
Change Ch Interface (Facility) admin state.
Green Interface is active, valid
signal, valid hardware,
no alarms
No action is required.
NW, NE Red P
in max
too high,
receiver damage
threshold exceeded
1 Measure the optical input power on the
receiver connector and compare the
measured value with the channel
module/pluggable transceiver specification.
2 Adjust the optical input power (i.e., install
the appropriate attenuators) to fulfill the
Optical Input Power requirements.
Yellow Loss of clock 1 Verify that the provisioned service type
matches the incoming signal type.
2 Check optical power measurements. Refer
to “Finding Your Problem - Follow the Light”
on p.53 in this document.
Signal degrade The number of bit/block errors exceeded the
configured threshold. To identify the failure
location, refer to the troubleshooting instructions
for the relevant signal degrade condition outlined
in Alarm and Event List.
Loss of character sync Unable to synchronize on the characters in the
incoming data stream.
1 Verify that fiber cables are connected.
2 Check optical power levels. Refer to
“Finding Your Problem - Follow the Light” on
p.53 in this document.
Table 41: LED Status of the 4TCA-PCN-4GU(S)+4G
FSP 3000R7 Maintenance and Troubleshooting Manual - Product Release 16.2 - Document Issue A 261
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