R2511-HP MSR Router Series Layer 2 - WAN Command Reference(V5)

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<Sysname> system-view
[Sysname] interface serial 1/0:23
[Sysname-Serial1/0:23] isdn protocol-type 5ess
isdn q921-permanent
Use isdn q921-permanent to enable the Q.921 permanent link function.
Use undo isdn q921-permanent to disable the Q.921 permanent link function.
Syntax
isdn q921-permanent
undo isdn q921-permanent
Views
ISDN BRI interface view
Default command level
2: System level
Usage guidelines
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.
Examples
# Enable the Q.921 permanent link function on interface BRI 2/0.
<Sysname> system-view
[Sysname] interface bri 2/0
[Sysname-Bri2/0] isdn q921-permanent
isdn q931-traditional
Use isdn q931-traditional to enable Q.931 (1988) on the interface.
Use undo isdn q931-traditional to restore the default.
Syntax
isdn q931-traditional
undo isdn q931-traditional
Default
An interface runs Q.931 (1998).
Views
ISDN interface view
Default command level
2: System level
Examples
# Enable Q.931 (1988) on interface BRI 2/0.
<Sysname> system-view