Cisco Systems OL-14619-01 Integrating Cisco Unity with the Phone System, Overview, C H A P T E R

C H A P T E R 6

Integrating Cisco Unity with the Phone System

See the following sections:

•Overview, page 6-1

•How an Integration Works, page 6-2

•Sample Path for a Call from the Phone System to a Subscriber, page 6-8

•General Integration Issues, page 6-9

•Integrating with Cisco Unified Communications Manager (by Using SCCP or SIP), page 6-10

•Integrating with Cisco Unified Communications Manager Express (by Using SCCP or SIP), page 6-17

•Integrating by Using SIP, page 6-22

•Integrating with Circuit-Switched Phone Systems by Using PIMG or TIMG Units, page 6-24

•Integrating with Multiple Phone Systems, page 6-30

•Optional Integration Features, page 6-32

•Centralized Voice Messaging, page 6-34

Overview

An integration enables communication between Cisco Unity and a phone system, providing subscribers with features that typically include the following:

•Calls to a subscriber extension that does not answer or is busy are forwarded to the subscriber personal greeting.

•Messages left for a subscriber activate the message waiting indicator (MWI) on the extension.

•A subscriber has easy access to messages by pressing a button on the phone and entering a password.

Depending on the phone system and the integration, other integration features may be available, including caller ID, call forward to the subscriber busy greeting, and identified subscriber messaging.

For a list of supported phone systems, see Supported Hardware and Software, and Support Policies for Cisco Unity Release 5.0 at http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_installation_guides_list.html.

Design Guide for Cisco Unity Release 5.x

OL-14619-01 6-1