Specifications

Setting Up the Network

How to Set Up the Network

Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide

How to Set Up the Network

This section contains the following tasks:

• Enabling IP Routing, page 40 (Required)

• Enabling SRST on an MGCP Gateway (Required)

• Configuring DHCP for Cisco Unified SRST Phones, page 42 (Required)

• Specifying Keepalive Intervals, page 45 (Optional)

• Configuring Cisco Unified SRST to Support Phone Functions, page 46 (Required)

• Verifying That Cisco Unified SRST Is Enabled, page 48 (Optional)

Enabling IP Routing

For information about enabling IP routing, see the “Enabling IP Routing” section in the “IP Addressing

and Services” chapter of the Cisco IOS IP Configuration Guide, Release 12.2.

Enabling SRST on an MGCP Gateway

To use SRST as your fallback mode with an MGCP gateway, SRST and MGCP fallback must both be

configured on the same gateway. The configuration below allows SRST to assume control over the voice

port and over call processing on the MGCP gateway.

Note The commands described in the configuration below are ineffective unless both commands are

configured. For instance, your configuration will not work if you only configure the ccm-manager

fallback-mgcp command.

Restrictions

Effective with Cisco IOS Release 12.3(14)T, the call application alternate command is replaced by the

service command. The service command can be used in all releases after Cisco IOS Release 12.3(14)T.

Both commands are reflected in Step 4.

SUMMARY STEPS

1. enable

2. configure terminal

3. ccm-manager fallback-mgcp

4. call application alternate [application-name]

service [alternate | default] service-name location

5. exit