Specifications

Configuring Cisco Unified SIP SRST Features Using Redirect Mode (for Version 3.0 Only)
How to Configure Cisco Unified SIP SRST Features Using Redirect Mode
41
Cisco Unified SIP SRST 4.0 System Administrator Guide
Configuring Call Redirect Enhancements to Support Calls Between SIP IP
Phones for Cisco Unified SIP SRST
The call redirect enhancement supports calls from a local SIP phone to another local SIP phone through
the Cisco IOS voice gateway. Prior to this enhancement, an attempt by a SIP phone to contact another
local SIP phone using the Cisco IOS voice gateway as if it were a SIP proxy or redirect server would
fail. However, now the Cisco IOS voice gateway can act as a SIP redirect server. The voice gateway
responds to the originator with a SIP Redirect message, allowing the SIP phone that originated the call
to establish a call to its destination.
The redirect ip2ip (voice service) and redirect ip2ip (dial-peer) commands allow you to enable the SIP
functionality, globally or on a specific inbound dial peer. The default application on Cisco Unified SIP
SRST supports IP-to-IP redirection.
• Configuring Call Redirect Enhancements to Support Calls Globally, page 41
• Configuring Call Redirect Enhancements to Support Calls on a Specific VoIP Dial Peer, page 42
Configuring Call Redirect Enhancements to Support Calls Globally
To enable global IP-to-IP call redirection for all VoIP dial peers, use voice service configuration mode.
Note When IP-to-IP redirection is configured in dial-peer configuration mode, the configuration for the
specific dial peer takes precedence over the global configuration entered under voice service
configuration mode.
SUMMARY STEPS
1. enable
2. configure terminal
3. voice service voip
4. redirect ip2ip
5. end
DETAILED STEPS
Command or Action Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Enters global configuration mode.