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Chapter 5
Using Loopbacks
Indication: The alarm is indicated when the ALM LED lights up or by using the
Corrective Actions:
•
Call the administrator of the remote module.
•
Wait for the signal to return.
Alarm Detection
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:
•
Diag Loopback (E1/T1) - 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.
•
Local Line Loopback (E1/T1) - The X330WAN Line Framer creates a loop on the
line towards the other peer module.
•
Local Payload Loopback (E1/T1) - The X330WAN Line Framer creates a loop
through itself and re-frames the signal on its way back from the peer module.
•
Remote Line Loopback (T1 only) - The X330WAN sends the remote peer
module a request to create a line loop. A Line Loopback signal is used to
indicate the request.
•
Remote Payload Loopback (T1 only) - 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."
36
show controllers command from the CLI. For more information,
refer to "Monitoring Traffic" on page 33.
Avaya X330W-2DS1 User's Guide
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Troubleshooting
