3Com MSR 30 Isdn bch-select-way, Isdn caller-number, Bch-local-manage command on the user side

570CHAPTER 37: ISDN CONFIGURATION COMMANDS

the router 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 router operates in exclusive local B-channel management mode. In this mode, the B channel selected by the router must be adopted for communication. In the Channel ID information element of the call Setup message sent for a call, the router indicates that the B channel is mandatory and unchangeable. If the connected exchange indicates a B channel different from the one selected by the router, call failure occurs.

Example # 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

Syntax	isdn bch-select-way { ascending descending }
View	ISDN interface view
Parameter	ascending: Selects B channels in ascending order.
	descending: Selects B channels in descending order.
Description	Use the isdn bch-select-waycommand to set a B channel selection method but
	it does not work when the switch manages ISDN B channel. Meanwhile, the
	setting of isdn bch-select-wayis a waste without configuring isdn
	bch-local-managecommand on the user side.
	When operating in B channel local management mode, the router selects B
	channels in ascending order by default.
Example	# Configure B channel selection method on the interface BRI 2/0 to descending
	order.
	<Sysname> system-view
	[Sysname] interface bri 2/0
	[Sysname-Bri2/0] isdn bch-select-way descending

isdn caller-number

Syntax isdn caller-number caller-numberundo isdn caller-number

View ISDN interface view