Troubleshooting Core Type TDM Channel Modules
LED
Name
LED Colors Potential Cause Solution for Troubleshooting
Nx Yellow Laser failure If a replacement module is available,
exchange the malfunctioning pluggable trans-
ceiver. Otherwise, return the malfunctioning
pluggable transceiver to ADVA Optical Net-
working.
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.
Loss of signal 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.
Optical Input Power out of
range
1 Measure the optical input power on the
receiver connector.
2 Compare the measured value with the
channel module/pluggable transceiver
specification.
3 Adjust the optical input power (i.e., the
appropriate attenuators) to fulfill the
optical input power requirements.
Loss of frame - No
frame sync detected
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.
Loss of output power -
Power non-existing or
below the defined minimum
level is detected at the out-
put. Normally a con-
sequence of loss of optical
input power. Also may be
due to failure/degeneration
of an internal component or
splice.
Refer to “Finding Your Problem - Follow the
Light” on p.53 in this document.
N2, N3, and
N4
Off
(N not Off)
The corresponding CFPhas
a single connector (for
example, LR10), is not
installed, or is not approved.
If the associated CFP has a single interface,
no action is required. Please refer to the
explanation pertaining to network LEDs
earlier in this section.
Table 26: LED Status of the 10TCC-PCN-40GU+100G
FSP 3000R7 Maintenance and Troubleshooting Manual - Product Release 16.2 - Document Issue A 155
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