E1/T1 Alarm Indication Signal

This alarm is reported when the all 1s signal (Alarm Indication Signal, abbreviated as AIS) is detected on the E1/T1 RX port.

The Major reason for this alram are:

?The E1/T1 link is incorrectly configured.

?The E1/T1 transmission link is faulty.

?The local device is faulty.

?The peer device is faulty.

Maximum case we found the TX device faulty, TX Cable loose connection, etc.

TX Device Mean which one ?

IDO or ODU..?

both.

thats mean fault may occur any TX Equipment.

documentation very useful for my job

When the fibre cut occur, it this alarm come..?

Nioce sharing

useful document, thanks