Cisco Systems OL-14619-01 manual How an Integration Works

Chapter 6 Integrating Cisco Unity with the Phone System

How an Integration Works

Cisco Unity can integrate with one or more phone systems at the same time. For details, see the Multiple Phone System Integration Guide for Cisco Unity 5.0 at http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_installation_and_configuration_g uides_list.html.

Circuit-switched phone systems can integrate with Cisco Unity by using one of the following integration methods:

PIMG/TIMG integrations	PIMG or TIMG units are media gateways between circuit-switched phone
	systems and IP networks. On the circuit-switched phone system side, there are
	digital (feature-set), analog, and T1-CAS interfaces. On the IP side, there is a
	SIP interface, which is how Cisco Unity communicates with the PIMG unit.
	PIMG/TIMG units are the preferred method for integrating with
	circuit-switched phone systems.
Voice card integrations	Voice cards connect circuit-switched phone systems and Cisco Unity through
	analog lines. Voice cards must be installed in the Cisco Unity server or in an
	expansion chassis that is connected to the Cisco Unity server.
	Support for voice cards is slowly being phased out, and voice cards are now
	only supported when Windows 2000 Server is installed on the Cisco Unity
	server. For information on the voice cards supported for use with Cisco Unity,
	see Supported Hardware and Software, and Support Policies for Cisco Unity
	Release 5.x at
	http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_installation
	_guides_list.html.

For detailed information on integrating Cisco Unity with a specific phone system, see the applicable Cisco Unity integration guide at http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_installation_and_configuration_g uides_list.html.

How an Integration Works

An integration depends on the following components to be successful:

•Lines and cables necessary to make physical connections (in circuit-switched phone systems) or a network connection (in Cisco Unified Communications Manager (CM) (formerly known as Cisco Unified CallManager) and SIP proxy servers). For more information, see the “Lines and Cables to Make Physical Connections” section on page 6-3.

•Settings in the phone system and in Cisco Unity. For more information, see the “Settings in the Phone System and in Cisco Unity” section on page 6-7.

•Call information exchanged by the phone system and Cisco Unity. For more information, see the “Call Information Exchanged by the Phone System and Cisco Unity” section on page 6-7.

•Call control (signals used to set up, monitor, and tear down a call) to determine and control the status of the call. For more information, see the “Call Control” section on page 6-8.

Design Guide for Cisco Unity Release 5.x

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