Isdn Bch-Local-Manage - H3C MSR810 Command Reference Manual

Field
Neg State
Init State
SPID timer
SPID resend

isdn bch-local-manage

Use isdn bch-local-manage to enable an ISDN interface to select ISDN B-channels for calls.
Use undo isdn bch-local-manage to restore the default.
Syntax
isdn bch-local-manage [ exclusive ]
undo isdn bch-local-manage
Default
B-channel selection is disabled on ISDN interfaces. The service provider switch selects B-channels
for calls.
Views
ISDN interface view
Predefined user roles
network-admin
Parameters
exclusive: Specifies exclusive B-channel selection. If you do not specify this keyword, the command
enables non-exclusive B-channel selection.
Usage guidelines
Typically, B-channel selection is done by the service provider switch. To improve call establishment
efficiency and reduce call losses on I SDN lines, you can enable the ISDN interface to select
B-channels for calls. This is particularly true for PRI ISDN lines.
Description
SPID negotiation state:
• SPID_UNASSIGNED—The SPID is not assigned, or the SPID assignment has
failed.
• ASSIGN_AWAITING_SPID—The user terminal has initiated an auto-SPID
request and is waiting for SPID assignment.
• SPID_ASSIGNED—The user terminal has selected one SPID from the SPID
options provided by the network.
• ASSIGN_AWAITING_CALL_CLEAR—The B-channel transits to this state if a
call is present when it receives an Auto-SPID request.
Layer 3 initialization state for the SPID:
• INIT_NULL—No Layer 3 initialization has occurred.
• INIT_IND—The service provider switch starts Layer 3 initialization.
• INIT_PROCEEDING—Layer 3 is initializing.
• INIT_END—Layer 3 initialization is finished successfully.
• INIT_AWAITING_CALL_CLEAR—The B-channel transits to this state if a call is
present when Q.931 receives a Layer 3 initialization request.
TSPID timer. This timer sets the maximum interval that ISDN waits for a response after
it sends an INFORMATION message. To configure this timer, use the isdn spid timer
command.
Maximum number of INFORMATION retransmissions. To configure this counter, use
the isdn spid resend command.
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