Command Reference Guide

3Com Router 5000 Family and Router 6000 Family alarm (CT3 Interface) ● 13
Command Reference
alarm (CT3 Interface)
Purpose Use the alarm command to enable the CT3 interface to detect/send alarm signals.
Use the undo alarm command to cancel the alarm signal detection/sending setting.
Syntax alarm { detect | generate { ais | rai | idle | febe } }
undo alarm { detect | generate { ais | rai | idle | febe } }
Parameters detect
Enables/disables periodical alarm signal detection. By
default, periodical alarm detection is enabled.
generate
Sends alarm signals, which can be AIS, RAI, idle, or
FEBE. Use this function for line state test. By default,
alarm signal sending is disabled.
ais
Alarm indication signal.
rai
Remote alarm indication signal.
idle
Idle signal.
febe
Far end block error signal.
Example Enable periodical alarm signal detection on CT3 interface 1/0/0.
<3Com > system-view
[3Com ] interface t3 1/0/0
[3Com -T3 1/0/0] alarm detect
Enable CT3 interface 1/0/0 to send AIS alarm signals.
<3Com > system-view
[3Com ] interface t3 1/0/0
[3Com -T3 1/0/0] alarm generate ais
View This command can be used in the following views:
■ CT3 Interface view
Description At the startup of the router, periodical alarm signal detection is enabled on the CT3
interface. When detecting LOS, LOF, or AIS signals, the interface sends RAI signals to
its peer. Alarm state report for the interface is real time; you may view that by
executing the
display controller t3 command.
The supported alarm signals, LOS, LOF, AIS, RAI, FEBE, and idle, are ANSI T1.107-1995
compliant.
You can only configure the CT3 interface to send a type of alarm signal. To have the
interface send another type of signal, use the
undo alarm command to delete the
previous setting first. In addition, when the RAI signal generated upon detection of