Chapter 3 troubleshooting and maintenance, Troubleshooting, Power – ADTRAN T1 CSU ACE User Manual
Page 35: Network los, Power network los, Troubleshooting and maintenance
61202022L1-1B
T1 CSU ACE User Manual
35
Chapter 3
Troubleshooting and
Maintenance
Troubleshooting guidelines and maintenance information are provid-
ed in this chapter.
TROUBLESHOOTING
Power
Condition: PWR LED is not illuminated.
1.
If locally powered, verify the power cable installation.
2.
If the 12 V wall-mount power supply is used, check the supply’s
cable and the circuit breaker for the 120 V receptacle the supply is
plugged into.
Network LOS
Condition: NET LOS LED is illuminated.
1.
Verify that the cable from the network demarcation is in
NET
modular jack on the bottom/end of the T1 CSU ACE.
2.
If all connections seem intact, the far end CSU ACE can be
looped back (using a BERT test set to send the LB code, or using
MANUAL LB
at the other end) to isolate the problem to the far
end customer premises or the network.
3.
If the problem persists after the LB has been activated, the prob-
lem appears to be within the network or the far end CSU ACE. In
this case, notify the carrier.
4.
If the problem disappears after loop-up, then the cause must be
at the far end customer premises.