AT&T MERLIN LEGEND Reference page 124

M a i n t e n a n c e
Network-Invoked
(BRI NET INV B1 LB ACT)
The B1 Ioopback testis invoked by the CO at installation to verify error-free
transmission. When the MERLIN LEGEND system receives this request from the
CO, the maintenance software turns on the red LED on the 800 CO-BRI module,
logs the condition as a permanent error, and takes the B-channel out of service.
When the condition returns to normal operation, the red LED goes off, the error
log entry is removed, and the B-channel returns to service.
Network-Invoked B2 Loopback Activation
(BRI NET INV B2 LB ACT)
The B2 Ioopback test is invoked by the CO at installation to verify error-free
transmission. When the MERLIN LEGEND system receives this request from the
CO, the maintenance software turns on the red LED on the 800 CO-BRI module,
logs the condition as a permanent error, and takes the B-channel out of service.
When the condition returns to normal operation, the red LED goes off, the error
log entry is removed, and the B-channel returns to service.
Network-Invoked Insertion Loss Loopback Activation
(BRI NET INV IL LB ACT)
The Insertion Loss Ioopback testis invoked by the CO at installation to verify the
transmission parameters of the loop. When the MERLIN LEGEND system
receives this request, the maintenance software turns on the red LED on the 800
CO-BRI module, logs the condition as a permanent error, and takes the affected
facilities out of service. When the condition returns to normal operation, the red
LED goes off, the error is removed from the permanent log, and the facilities
return to service.
Network-Invoked Quiet Mode Loopback Activation
(BRI NET INV QM LB ACT)
The Quiet Mode Ioopback testis invoked by the CO at installation to verify the
transmission parameters of the loop. When the MERLIN LEGEND system
receives this request, the maintenance software turns on the red LED on the 800
CO-BRI module, logs the condition as a permanent error, and takes the affected
facilities out of service. When the condition returns to normal operation, the red
LED goes off, the error is removed from the permanent log, and the facilities
return to service.
B1 Loopback Activation
Error Logs and Error Messages
6-21