Isdn Bch-Select-Way - HP MSR series Command Reference Manual

Syntax
isdn bch-local-manage [ exclusive ]
undo isdn bch-local-manage
Default
The local ISDN B channel management is not enabled, and the ISDN B channel is managed by the ISDN
switch.
Views
ISDN interface view
Default command level
2: System level
Parameters
exclusive: Exclusive local management mode for ISDN B channels. When the B channel indicated by the
exchange is inconsistent with the one required by the local end, call failure occurs.
Usage guidelines
It is very important to put appropriate control on the B channels used for calls in process, especially in PRI
mode. Proper channel management can improve call efficiency and reduce call loss. In most cases, the
centralized B channel management provided by exchanges can work well. HP recommends that you use
the management function provided by exchanges in most cases, despite that the ISDN module can
provide the channel management function as well.
Configured with 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 exchange has higher priority
in B channel selection. If the B channel locally selected for a call is different from the one indicated by the
exchange, the one indicated by the exchange 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 exchange
indicates a B channel different from the locally selected one, call failure occurs.
Examples
# Enable interface BRI 2/0 local ISDN B channel management.
<Sysname> system-view
[Sysname] interface bri 2/0
[Sysname-Bri2/0] isdn bch-local-manage

isdn bch-select-way

Use isdn bch-select-way to set a B channel selection method but it does not work when the switch
manages ISDN B channel. At the same time, the setting of isdn bch-select-way is a waste without
configuring the isdn bch-local-manage command on the user side.
Use undo isdn bch-select-way to restore the default.
Syntax
isdn bch-select-way { ascending | descending }
74