Enabling Permanent Q.921 Link Connectivity On An Isdn Bri Interface; Enabling Persistent Layer 1 Activation On A Bri Interface - HP MSR Router Series Wan Access Configuration Manual

request a TEI from the switch before the interface can establish a call on a B-channel. If per-channel TEI
assignment is not configured, only one B-channel can be brought up. For example, you must configure
per-channel TEI assignment when a BRI interface is connected to an ISDN NI compliant DMS- 1 00 switch
in the North America.
You cannot configure per-channel TEI assignment in the following situations:
The BRI interface's data link type is point-to-point.
•
• A call is present on the interface.
To configure per-channel TEI assignment on an ISDN BRI interface:
Step
Enter system view.
1.
2. Enter ISDN BRI interface view.
3. Enable per-channel TEI
assignment.
Enabling permanent Q.921 link connectivity on an ISDN BRI
interface
You can enable permanent Q.921 link connectivity only on user-side ISDN BRI interfaces.
When this function is enabled, the ISDN BRI interface establishes and maintains permanent data link
connections automatically, regardless of whether or not a call is present.
When this function is disabled, the ISDN BRI interface transits to the multiframe established state only
when a call is present. In multiframe established state, the interface disconnects the Q.921 link if no
Q.931 call is present when the T325 timer expires.
To ensure successful call setup when ISDN NI is used, you must enable permanent Q.921 link
connectivity.
To enable permanent Q.921 link connectivity on an ISDN BRI interface:
Step
1. Enter system view.
2. Enter ISDN BRI interface
view.
3. Enable permanent Q.921
link connectivity.

Enabling persistent Layer 1 activation on a BRI interface

Persistent Layer 1 activation is available only on network-side BRI interfaces.
NOTE:
Only BRI interfaces on the BSV module can operate on the network side.
Command
system-view
interface bri interface-number
isdn two-tei
Command
system-view
interface bri interface-number
isdn q921-permanent
121
Remarks
N/A
N/A
By default, all B-channels on a
BRI interface use the same TEI.
Remarks
N/A
N/A
By default, permanent Q.921 link
connectivity is disabled.