Avaya X330W2-DS1 Manuale Utente

Chapter 5

Using Loopbacks

36

Avaya X330W-2DS1 User’s Guide

The alarm is indicated when the ALM LED lights up or by using the 

 command from the CLI. For more information, 

refer to "Monitoring Traffic" on page 33.

•

Call the administrator of the remote module.

•

Wait for the signal to return.

Alarms can be identified on the X330WAN either using the LEDs on the front panel 
or using the CLI.
The X330WAN front panel LEDs can indicate two types of Local Alarms:
•

If a LOS is sensed by a E1/T1 port, its SIG LED will be off and the ALM LED 
will be on.

•

When all other alarms are sensed by a E1/T1 port, the ALM LED will light.

In addition, an Alarm condition will be indicated by a message on the CLI screen, 
for example, “Controller T1 1 changed state to down (LOS)”. 
More detailed information about alarms can be obtained using the 
show controllers

 CLI command.

Using Loopbacks

The X330WAN supports the following Loopback types:
•

 - The X330WAN CPU instructs the Line Framer to 

create a loop towards the CPU. A Blue Alarm (AIS) is sent on the line to the peer 
module.

•

 - The X330WAN Line Framer creates a loop on the 

line towards the other peer module.

•

 - The X330WAN Line Framer creates a loop 

through itself and re-frames the signal on its way back from the peer module. 

•

 - The X330WAN sends the remote peer 

module a request to create a line loop. A Line Loopback signal is used to 
indicate the request.

•

 - The X330WAN sends the remote peer 

module a request to create a loop through its Line Framer. A Payload Loopback 
signal is used to indicate the request. The Remote Payload Loopback type is 
only available in ESF framing.

To instruct the X330WAN to perform a loopback, use the loopback diag, 
loopback local

, and loopback remote command. For more information 

about these commands, see Chapter 7, "X330WAN CLI Commands."