Specifications

December 2008 Page B–1
Appendix B — Troubleshooting
Appendix B – Troubleshooting Guide
SYMPTOM SOLUTION
1. Steady red status LED on Maintenance,
T1/E1, and/or Transceiver Module
1. Power down chassis for 5 seconds.
2. Make sure that NOVRAM U4 on the
Maintenance Module is installed correctly.
3. Replace the module.
4. Set the RT clock.
2. Red status LED on Power Supply 1. Check for proper power connections.
2. Make sure that the chassis is unlocked.
3. Steady LOS LED on Transceiver Module 1. Make sure that all transceiver connections
are correct.
2. Check the receive levels on the fiber optic
cables or T1/E1 links.
3. Replace the Transceiver Module.
4. Occasional LOS LED on Framer Module 1. Make sure that only one chassis is set as the
Master, in ring or linear systems.
2. Make sure that all slaves in the loop are set
to sync on the transceiver “looking” toward
the Master, all in the same direction.
5. Framer Module SYNC (synchronization)
and FR SYNC (frame synchronization)
LEDs flash on and off
1. If the system is in a loop, make sure the SF
Sync is disabled on one chassis in the loop
(and enabled on all the other chassis in the
loop).
2. Make sure that only one chassis is set as the
Master.
3. Make sure that all slaves in the loop are set
to sync on the transceiver “looking” toward
the Master.
6. Flashing Major alarm on Power supply
Module -or-
Maint. Module status LED flashes red for
1 second then green 1 second on power up
1. The FCS detected the NOVRAM battery has
failed upon power up. Before power down,
save configuration settings. Contact your
Pulsar representative.