Mgcp Gateways And Srst; Support For Cisco Unified Ip Phones And Platforms; Finding Cisco Ios Software Releases That Support Cisco Unified Srst - Cisco CP-7911G-CH1 System Administrator Manual

Cisco Unified SCCP and SIP SRST Feature Overview

MGCP Gateways and SRST

MGCP fallback is a different feature than SRST and, when configured as an individual feature, can be
used by a PSTN gateway. To use SRST as your fallback mode on an MGCP gateway, SRST and MGCP
fallback must both be configured on the same gateway. MGCP and SRST have had the capability to be
configured on the same gateway since Cisco IOS Release 12.2(11)T.
To make outbound calls while in SRST mode on your MGCP gateway, two fallback commands must be
configured on the MGCP gateway. These two commands allow SRST to assume control over the voice
port and over call processing on the MGCP gateway. With Cisco IOS earlier than 12.3(14)T, the two
commands are the ccm-manager fallback-mgcp and call application alternate commands. With
Cisco IOS releases after 12.3(14)T, the ccm-manager fallback-mgcp and service commands must be
configured. A complete configuration for these commands is shown in the section the
Unified SRST on an MGCP Gateway" section on page
Note The commands listed above are ineffective unless both commands are configured. For instance, your
configuration will not work if you only configure the ccm-manager fallback-mgcp command.
For more information on the fallback methods for MGCP gateways, see the
Support for Cisco Unified Communications Manager
Transition to Default H.323 Session Application

Support for Cisco Unified IP Phones and Platforms

The following sections provide information about Cisco Feature Navigator and the histories of
Cisco Unified IP Phone, platform, and Cisco Unified CM support from Cisco SRST Version 1.0 to the
present version of Cisco Unified SRST.
•
•
•
•
•
•
•

Finding Cisco IOS Software Releases That Support Cisco Unified SRST

With Cisco IOS Release 12.4(15)T, the number of SIP phones supported on each platform is now
Note
equivalent to the number of SCCP phones supported. For example, 3845 now supports 720 phones
regardless of whether these are SIP or SCCP.
To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not
required.
OL-13143-04
Finding Cisco IOS Software Releases That Support Cisco Unified SRST, page 23
Cisco Unified IP Phone Support, page 24
Platform and Memory Support, page 24
Cisco Unified Communications Manager Compatibility, page 24
Signal Support, page 25
Language Support, page 25
Switch Support, page 25
64.
document or the
document.
Cisco Unified SCCP and SIP SRST System Administrator Guide
MGCP Gateways and SRST
"Enabling Cisco
Configuring MGCP Gateway
MGCP Gateway Fallback
23