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6-18
Design Guide for Cisco Unity Release 5.x
OL-14619-01
Chapter 6 Integrating Cisco Unity with the Phone System
Integrating with Cisco Unified Communications Manager Express (by Using SCCP or SIP)
For information on the compatibility of Cisco Unity and Cisco Unified CM Express versions with the
Cisco
Unity-CM TSP and the SIP trunk, see the following documents at
http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_device_support_tables_list.html:
• SCCP Compatibility Matrix: Cisco Unity, the Cisco Unity-CM TSP, Cisco Unified Communications
Manager, and Cisco Unified Communications Manager Express
• SIP Trunk Compatibility Matrix: Cisco Unity and Cisco Unified Communications Manager
For information on how to integrate Cisco Unity with Cisco Unified CM Express, 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.
For more information on using the SIP protocol to integrate Cisco Unity with Cisco Unified CM
Express, see the
“Integrating by Using SIP” section on page 6-22.
Multiple Cisco Unified Communications Manager Express Version Support
A single Cisco Unity server can support multiple versions of Cisco Unified CM Express. The version of
the Cisco
Unity-CM TSP or SIP trunk being used must support all versions of Cisco Unified CM Express
integrated with Cisco
Unity. See the following documents at
http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_device_support_tables_list.html:
• SCCP Compatibility Matrix: Cisco Unity, the Cisco Unity-CM TSP, Cisco Unified Communications
Manager, and Cisco Unified Communications Manager Express
• SIP Trunk Compatibility Matrix: Cisco Unity and Cisco Unified Communications Manager
Table 6-5 Differences Between SCCP and SIP Integration Methods
Feature SCCP SIP
Communication method Cisco Unity-CM TSP SIP trunk
Failover Supported Not supported
Use of SCCP and SIP phones Supported Some SCCP phones may require
use of a media termination point
(MTP)
Support for Cisco Unified CM
versions
All versions Versions 5.x and later
Cisco Unified CM versions 5.x
and later
Supported Supported
Cisco Unified CM
authentication and encryption
Supported Not supported
First/last redirecting number Supported Supported
QOS Supported Supported