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AI2524 Router Card User’s Manual
Page 14-4 August 1997
2524UM
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-module
command.
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-loopback
commands, 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.