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

Several CLI commands have been modified to allow you to use the G.723.1 codec and template

number 4. See Table 4 for a complete list of modified commands for this release.

Note The G.723.1 codecs are not supported for VISM cards.

Announcement File System

This release allows VISM to play prerecorded local announcements in switched VoIP connections.

Under the control of a call agent, announcements can be played toward any IP endpoint or toward any

VISM endpoint.

Up to 125 different announcements may be cached on the VISM card for immediate playout. A persistent

announcement storage area exists in the packet network. Announcements are downloaded on demand

from the announcement storage area and remain on the VISM card until they have reached expiry or are

replaced. If the 125 announcement maximum is reached, subsequent requests for announcements not on

the VISM card result in the replacement of “cached” announcements.

Announcements can be played over established connections in any VISM supported codec, but they must

exist on the announcement file server in the desired encoding.

Note You must play announcements in the exact codec in which they have been recorded.

VISM announcements require the support of the MGCP 0.1/1.0 call agent.

Announcement Timeouts

VISM uses a provisionable timeout value of 5 seconds. If an announcement cannot start playing within

the timeout value of receiving the request, the action is canceled and, if requested by the call agent, an

“of” event is reported. If the call agent specifies a timeout value in the request, this value will be ignored.

Announcement Direction

Announcements can be played toward the packet network or toward the TDM network (not both). The

direction is determined by the notation of the MGCP S: line. Announcement direction examples:

S: a/ann(all-lines-busy.au)

Explanation Indicates that all-lines-busy.au is to be played toward the TDM network.

S: a/ann@connid(all-lines-busy.au)

Explanation Indicates that all-lines-busy.au is to be played toward the packet network.

Broadcast Announcements

VISM supports announcement requests for a single endpoint or connection. The request may only

specify a single announcement to be played on a single endpoint in a single direction. Broadcast

announcements are not supported.