Troubleshooting Core Type TDM Channel Modules
LED
Name
LED Colors Potential Cause Solution for Troubleshooting
Cx Yellow Optical Input Power out of range Measure the optical input power on the
receiver connector.
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.
Loss of frame - No frame sync
detected
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.
Loss of input power - Power non-
existing or below the defined
minimum level is detected at the
input.
Refer to “Finding Your Problem - Follow
the Light” on p.53 in this document..
Loss of output power - Power non-
existing or below the defined
minimum level is detected at the
output. Normally a consequence of
loss of optical input power. Also
may be due to failure/degeneration
of an internal component or splice.
Off No Ch Interface (Facility)
provisioned on that pluggable
transceiver.
Install an appropriate pluggable
transceiver.
Provision the pluggable transceiver.
Enable the admin state - Configure the
pluggable transceiver admin state to “In
Service”.
Provision a Ch Interface (Facility) on the
pluggable transceiver.
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.
Table 19: LED Status of the 4TCC-PCN-2G1U+2G5
100 FSP 3000R7 Maintenance and Troubleshooting Manual - Product Release 16.2 - Document Issue A
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