Troubleshooting Core Type TDM Channel Modules
LED
Name
LED Colors Potential Cause Solution for Troubleshooting
Cx Red Pluggable transceiver was inserted
and interface provisioned, then the
pluggable transceiver was
removed.
Reinsert the pluggable transceiver.
P
in max
too high, receiver damage
threshold exceeded.
Measure the optical input power on the
receiver connector and compare the
measured value with the channel
module/pluggable transceiver
specification.
Adjust the optical input power (i.e.,
install the appropriate attenuators) to
fulfill the Optical Input Power
requirements.
Yellow Loss of clock Verify that the provisioned service type
matches the incoming signal type.
Check optical power measurements.
Refer to the procedure in “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.
Verify that fiber cables are connected.
Check optical power levels. Refer to
“Finding Your Problem - Follow the Light”
on p.53 in this document.
Loss of signal Verify that fiber cables are connected.
Check optical power levels. Refer to
“Finding Your Problem - Follow the Light”
on p.53 in this document.
Table 19: LED Status of the 4TCC-PCN-2G1U+2G5
FSP 3000R7 Maintenance and Troubleshooting Manual - Product Release 16.2 - Document Issue A 99
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