Black Box MT850A The following chart describes each LED, and its state, of the Router card.

Compact T1 - Release 6.1 14-23
Router (CMG) Card
LEDs
LEDs
The following chart describes each LED, and it’s state, of the Router card.
LED State Description
CRD Off Loss of power
Green No current alarms
Red Alarm state active. See alarm log for cause
Red Flashing Self-test or Boot in-process
Yellow Flashing Card is saving data to flash RAM, do not
power down
VOIP
Off No active VoIP calls or if the MGCP protocol is optioned down
Green Active VoIP calls
Red Call agent unreachable
Yellow Insufficient VoIP resources to complete
call
LNK Off No ethernet link
Green Good ethernet link
10/100 Off 10 Mb ethernet
Green 100 Mb ethernet
TX Off No ethernet transmit activity
Green Ethernet transmit activity
Yellow Current ethernet transmit collision
RX Off No current ethernet receive activity
Green Current ethernet receive activity