Command Reference Guide

196 ● isdn q921-permanent 3Com Router 5000 Family and Router 6000 Family
Command Reference
isdn q921-permanent
Purpose Use the isdn q921-permanent command to enable the Q.921 permanent link
function.
Use the undo isdn q921-permanent command to disable the Q.921 permanent
link function.
Syntax isdn q921-permanent
undo isdn q921-permanent
Parameters None
Default By default, the Q.921 permanent link function is disabled.
Example Enable the Q.921 permanent link function on interface BRI 2/0/0.
[3Com-Bri2/0/0] isdn q921-permanent
Disable the Q.921 permanent link function on interface BRI 2/0/0.
[3Com-Bri2/0/0] undo isdn q921-permanent
View This command can be used in the following views:
■ ISDN Interface View
Description After you enable the function, the ISDN BRI interface automatically sets up and
maintains one or two Layer 2 links, whether Layer 3 calls are present on it or not. Two
Layer 2 links involves when two-TEI mode is enabled on the interface.