Restarting a B-Channel

You can restart a specific B-channel belonging to an ISDN or CAS trunk, using the SNMP MIB variable, acTrunkISDNCommonRestartBChannel. This may be useful, for example, for troubleshooting specific voice channels.

If a voice call is currently in progress on the B-channel, it is disconnected when the B-channel is restarted.
B-channel restart can only be done if the D-channel of the trunk to which it belongs is synchronized (Layer 2).
B-channel restart doesn't affect the B-channel's configuration.