Installation guide

Release Notes for Cisco Voice Interworking Service Module Release 3.0(0)

Part Number OL-2523-01 Rev. B0, January 9, 2004

VISM Features

• dspannprefcodec

• dspannreqtimeout

Call Agent-Controlled T.38 Fax

The call agent-controlled T.38 fax feature is an additional operational mode for MGCP 1.0 to request

T.38. This addition allows VISM to interoperate with H.323 and non-Cisco gateways, and is supported

for VoIP calls. This feature is activated based on the fax tone and signaling carried with the call agent.

The modified cnft38fxlco command allows you to configure the local connection option fax preamble

response to off. All previous options are valid.

Additional Support for MGCP 1.0

This release expands the support for the Media Gateway Control Protocol (MGCP) 1.0, which was

introduced in VISM 2.2. The following are implemented for the MGCP 1.0 feature support:

• Restart in Progress command disconnect procedure wait delay timer value specification for the

following:

–

Initial

–

Minimum

–

Maximum

• Call agent redundancy group protocol configuration for the following:

–

Quarantine handling method for persistent events

–

Default quarantine handling method for each protocol

–

Ability to keep events from previous lists, until explicitly requested to be removed

–

Ability to send provisional responses

–

Ability to send response acknowledgments

–

Ability to provide a disconnect method

–

Ability to cancel previously issued graceful restart commands

Use the following new CLI commands to configure the MGCP 1.0 feature:

• cnfdisctimers

• cnfmgcgrpprotocol

Use the following new CLI command to display the MGCP 1.0 feature:

• dspdisctimers

You can also use the following modified commands to configure the MGCP 1.0 feature:

• addmgcgrpprotocol

• cnfxgcppeer

• delmgcgrpprotocol