AI2524 Router Card User’s Manual

Super Frame configured, the remote alarm condition is signalled out of band in the facility data link.

You can see if the FT1/T1 CSU/DSU is receiving a remote alarm (yel- low alarm) by issuing the show service-modulecommand.

To disable remote alarms, type this in interface configuration mode:

no service-module t1 remote-alarm-enable

Enable Loopcodes that Initiate Remote Loopbacks

To configure the remote loopback code used to transmit or accept CSU loopback requests, and type this in interface configuration mode:

service-module t1 remote-loopback full

To configure the loopback code used by the local CSU/DSU to gener- ate or detect payload-loopbackcommands, type this in interface configuration mode:

service-module t1 remote-loopback payload [alternate v54]

Note:

By entering the service-module t1 remote-

 

loopback command without specifying any keywords,

 

you enable the standard-loopup codes, which use a 1-in-5

 

pattern for loopup and a 1-in-3 pattern for loopdown.

You can simultaneously configure the full and payload loopback points. However, only one loopback payload code can be configured at a time. For example, if you configure the service-module t1 remote-loopback payload alternate command, a pay- load v.54 request, which is the industry standard and default, cannot b transmitted or accepted. Full and payload loopbacks with standard- loopup codes are enabled by default.

The no form of this command disables loopback requests. For exam- ple, the no service-module t1 remote-loopback full command ignores all full-bandwidth loopback transmissions and re- quests. Configuring the no form of the command may not prevent telco line providers from looping your router in esf mode, because fractional T1/T1 telcos use facilities data-link messages to initiate loopbacks.

If you enable the service-module t1 remote-loopback command, the loopback remote commands on the FT1/T1 CSU/ DSU module will not be successful.

Page 14-4

August 1997

 

2524UM

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AIS AI2524 user manual Enable Loopcodes that Initiate Remote Loopbacks, By entering the service-module t1 remote