Specifications

Cisco Unified SIP SRST Feature Roadmap

Feature Roadmap

Cisco Unified SIP SRST 4.0 System Administrator Guide

Feature Roadmap

Table 2 provides a summary of Cisco Unified SIP SRST features by release.

Table 2 Cisco Unified SIP SRST Features by Cisco IOS Release

Cisco SIP SRST

Version Cisco IOS Release Modifications

Version 4.0 12.4(4)XC —

Version 3.4 12.4(4)T Cisco SIP SRST 3.4 includes the following features:

• Getting Started

• Configuring Cisco Unified SIP SRST Features Using Redirect Mode (for

Version 3.0 Only) (formerly SIP SRST)

• Configuring Cisco Unified SIP SRST Features Using Back-to-Back User

Agent Mode (for Version 3.4 and Version 4.0 Only)

Version 3.2 12.3(11)T The SIP SRST feature was updated to include additional prerequisite information,

including phone and memory requirements.

Version 3.1 12.3(7)T The SIP SRST feature was integrated into Cisco IOS Release 12.3(7)T.

Version 3.0 12.2(15)ZJ

12.3(4)T

The SIP SRST feature was introduced.