Specifications

Getting Started

How to Upgrade from Cisco SIP SRST 3.0 to Cisco Unified SIP SRST 4.0

Cisco Unified SIP SRST 4.0 System Administrator Guide

Enabling SIP-to-SIP Connection Capabilities

VoIP-to-VoIP connections permit the termination and reorigination of transferred and forwarded calls

over the VoIP network. For Cisco Unified SIP SRST 4.0 we enable SIP-to-SIP connections for hairpin

call routing. The B2BUA that routes the call uses the SIP-to-SIP connection. Because VoIP-to-VoIP

connections are disabled on the router by default, they must be explicitly enabled to use call routing.

SUMMARY STEPS

1. enable

2. configure terminal

3. voice service voip

4. allow-connections sip to sip

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.

Step 3

voice service voip

Example:

Router(config)# voice service voip

Enters voice service configuration mode to establish global call

transfer and forwarding parameters.

Step 4

allow-connections sip to sip

Example:

Router(config-voi-srv)# allow-connections

sip to sip

Enables VoIP-to-VoIP call connections. Use the no form of the

command to disable VoIP-to-VoIP connections, which is the

default.

Step 5

end

Example:

Router(conf-voi-serv)# end

Returns to privileged EXEC mode.