Leds - Black Box Compact T1 MT850A User Manual

FXO Voice Card

LEDs

LEDs
Each FXO port on a card has its own LED, described in the table below.
State
Off
Green
Red
Yellow
Flashing
green
7-8
Loop Start Ground Start
Meaning Meaning
N/A Idle (tip open)
Idle Tip ground
(incoming seizure)
N/A Ring ground
(outgoing seizure)
Call in progress Call in progress
Ringing Ringing
Dial Pulse Termination
Meaning
Idle (loop open)
Incoming seizure
Loop closure (outgoing
seizure)
Call in progress (reverse
battery)
N/A
Compact T1 - Release 6.1