Programming instructions

350
3300 ICP Technician’s Handbook
BRI NSU
BRI NSU LED States
Fifteen circuit LEDs and one status LED are mounted on the faceplate.
The status LED shows the status of the CEPT link, and each of the circuit
LEDs shows the status of one BRI circuit. The BRI circuit LEDs are also
used during card initialization to indicate the progress of the self-test and
to indicate that the download is in progress.
Figure 95: BRI NSU LEDs
Table 112: BRI NSU CEPT LED States
LED Status Meaning
ON Call in progress on DPNSS link.
Flashing 1 second cycle: Layer 1 established.
4 seconds cycle: Layer 2 established.
OFF CEPT link not established.