Troubleshooting guide

Table Of Contents
363
Status LEDs
Digital Services Unit LEDs
BRI Card
One status LED and fifteen circuit LEDs are mounted on the BRI card
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 (see Table 102).
Figure 161: DSU BRI Card LEDs
Table 102: BRI Card Circuit LEDs
LED State Meaning (All LEDs)
CEPT
Status
Off CEPT link not established
Flashing at 1 Hz Layer 1 established
Flashing at 4 Hz Layer 2 established
On Call in progress on the DPNSS link
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