Specifications

Configuring the SIP Registrar

How to Configure the SIP Registrar

Cisco Unified SIP SRST 4.0 System Administrator Guide

Prerequisites

The SIP endpoints (IP phones) must support dual concurrent registration, which is registering with the

main SIP proxy and the Cisco Unified SIP SRST device (redirect server) at the same time. If this

requirement is not met, the Cisco Unified SIP SRST device cannot route incoming calls to the SIP phone.

For configuration instructions, see the Cisco IP Phone Documentation for Session Initiation Protocol

(SIP).

SUMMARY STEPS

1. enable

2. configure terminal

3. voice service voip

4. sip

5. registrar server [expires [max sec] [min sec]]

6. 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.

Step 4

sip

Example:

Router(config-voi-srv)# sip

Enters SIP configuration mode.