Cisco Systems OL-14619-01 manual Feature, Sccp, 6-10

Chapter 6 Integrating Cisco Unity with the Phone System

Integrating with Cisco Unified Communications Manager (by Using SCCP or SIP)

•Circuit-switched phone systems that connect to voice cards and that use an RS-232 serial cable for the integration must be within 50 feet of the Cisco Unity server. For serial cable specifications, see the applicable Cisco Unity integration guide at http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_installation_and_configuratio n_guides_list.html.

•Voice card integrations are supported only when Windows 2000 Server is installed on the

Cisco Unity server. For a list of supported voice cards, 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.

•The license file for Cisco Unity may enable more voice messaging ports than the customer needs. Install only the number of ports that are needed, so that system resources are not allocated to unused ports, and do not exceed the port limitations set for the platform. For more information, see the Cisco Unity Supported Platform List at http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_data_sheets_list.html). For additional information about configuring voice messaging ports, see the “Planning How the Voice Messaging Ports Will Be Used in Cisco Unity” section in the applicable Cisco Unity integration guide at http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_installation_and_configuratio n_guides_list.html.

Integrating with Cisco Unified Communications Manager (by Using SCCP or SIP)

Cisco Unity supports Cisco Unified Communications Manager (CM) (formerly known as Cisco Unified CallManager) integrations through both SCCP and SIP interfaces. Table 6-1shows the major differences in these integration methods.

Table 6-1	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		All versions	Versions 5.x and later
versions
Cisco Unified CM versions 5.x		Supported	Supported
and later
Cisco Unified CM		Supported	Not supported
authentication and encryption
First/last redirecting number		Supported	Supported
QOS		Supported	Supported

	Design Guide for Cisco Unity Release 5.x
6-10	OL-14619-01