4000 Router Series Layer 2 - WAN Command Reference

Predefined user roles

network-admin

Parameters

exclusive: Specifies the exclusive local management mode for ISDN B channels. When the B channel

indicated by the PBX is inconsistent with that required by the local end, the call fails.

Usage guidelines

It is very important to put appropriate control over B channels used for calls in process, especially in PRI

mode. Proper channel management can improve call efficiency and reduce call loss. Normally, the

centralized B channel management provided by the PBX works well. HP recommends that you use the

management function provided by the PBX in most cases, despite that the ISDN module provides the

channel management function as well.

Configured with the isdn bch-local-manage command, the device operates in local B-channel

management mode to select available B channels for calls. Despite this, the connected PBX has higher

priority in B channel selection. If the B channel locally selected for a call is different from that indicated

by the PBX, the one indicated by the PBX is used for communication.

Configured with the isdn bch-local-manage exclusive command, the device operates in exclusive local

B-channel management mode. In this mode, the B channel locally selected must be used for

communication. In the Channel ID information element of the call setup message sent for a call, the

device indicates that the B channel is mandatory and unchangeable. If the connected PBX indicates a B

channel different from the locally selected one, the call fails.

Examples

# Enable local ISDN B channel management on BRI 2/0.

<Sysname> system-view

[Sysname] interface bri 2/0

[Sysname-Bri2/0] isdn bch-local-manage

Related commands

isdn bch-select-way

Use isdn bch-select-way to set a B channel selection method.

Use undo isdn bch-select-way to restore the default.

Syntax

isdn bch-select-way { ascending | descending }

undo isdn bch-select-way

Default

When operating in local B channel management mode, the device selects B channels in ascending

order.

Views

ISDN interface view

Predefined user roles

network-admin