Digital Services Unit Leds - Mitel 3300 Technician's Handbook

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).
LED
CEPT
Status Off
Flashing at 1 Hz
Flashing at 4 Hz
On
Figure 161: DSU BRI Card LEDs
Table 102: BRI Card Circuit LEDs
State
CEPT link not established
Layer 1 established
Layer 2 established
Call in progress on the DPNSS link
Meaning (All LEDs)
Status LEDs
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