Command:

isdn incoming-voice modem


Mode:

Router(config-if)#


Syntax:

isdn incoming-voice {voice | data [56 | 64] | modem [56 | 64]}

no isdn incoming-voice {voice | data [56 | 64] | modem [56 | 64]}


Syntax Description:
voice Incoming voice calls bypass the modems and will be handled as a voice call.
data Incoming voice calls bypass the modems and will be handled as digital data. If this keyword is selected, you can specify a B-channel bandwidth of either 56 kbps or 64 kbps. If no argument is entered, the default value is 64.
modem Incoming voice calls are passed over to the digital modems, where they negotiate the appropriate modem connection with the far-end modem. If this keyword is selected, you can specify a B-channel bandwidth of either 56 kbps or 64 kbps. If no argument is entered, the default value is 64.

Command Description:

To allow all incoming ISDN voice calls to access onboard modems, use the isdn incoming-voice modem interface configuration command. Use the no form of this command to stop all incoming voice calls from accessing the modems.

Usage Guidelines

Configure this command on each D channel in the access server or router. Incoming circuit switched data calls are not affected by this command.

This command is not used for channelized T1 or channelized E1 network scenarios. These networks use traditional analog trunks that have in-band signaling. Use the isdn incoming-voice modem command only when you are using ISDN.


Example:

The following example enables incoming and outgoing ISDN calls to route to the modems using the D channel serial interface:

Router(config)#interface serial 0:23
Router(config-if)#isdn incoming-voice modem

Misconceptions:
None

Related Commands:
None

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