Server Alarms - Avaya Support

MM710 E1/T1 Media Module LEDs
The MM710 E1/T1 Media Module has four LEDs on its faceplate.
Name Color Description
Media Module LEDs
ALM RED This LED indicates a media module failure or mismatch, a loss of
signal, or the D-Channel is down. This LED is also turned ON when
the media module is inserted and turns OFF after initialization.
TST GREEN Turned on during power-up self-testing and maintenance testing.
ACT YELLOW This LED indicates that the clock is synchronized with a source,
usually the Central Office. The LED blinks 2.8 seconds ON and 300
ms OFF. This is the most common condition.
For ISDN operation, the yellow ACT LED will be turned on if ANY port has an active TDM
connection (including the D-channel).
Synchronization
The opposite blinking of the yellow LED is 300 ms ON and 2.8
seconds OFF. This is an error condition, and indicates that the MM710
T1/E1 media module is not synchronized with a clock.
An infrequent occurrence is a steady yellow ON. This indicates in-use
activity only when clock synchronization is set to local.
SIG GREEN This LED indicates the presence of a valid signal on the T1/E1 line.
The yellow ACT LED displays the synchronization status of the MM710 media module.
● If the ACT LED is solidly ON or OFF, it has not been defined as a synchronization source.
If it is ON, at least one channel is active. If the facility is an ISDN facility, the D-Channel will
count as an active channel and will cause the ACT LED to be ON.
● When the MM710 is driving a clock sync source line to the main clock, the ACT indicates
that the MM710 is the sync source by flashing with a regular 3-second sequence:
Communication Manager Release 5.0 Issue 4 January 2008 343