Specifications

Overview of Cisco Unified SRST

Prerequisites for Configuring Cisco Unified SRST

Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide

Prerequisites for Configuring Cisco Unified SRST

Before configuring Cisco Unified SRST you must do the following:

• You have an account on Cisco.com to download software.

To obtain an account on Cisco.com, go to www.cisco.com and click Register at the top of the screen.

• You have purchased a Cisco Unified SRST license.

To purchase a license, go to http://www.cisco.com/cgi-bin/tablebuild.pl/ip-key.

• Choose an appropriate Cisco Unified SRST version. Each SRST version supports a specific set of

IP phones, memory requirements, features, and directory numbers (DNs). See the “Platform and

Memory Support” section on page 29 and the “Restrictions for Configuring Cisco Unified SRST”

section on page 33.

• Choose an appropriate phoneload. SRST only supports certain phoneloads that have been tested with

the various Cisco Unified CallManager versions. For the most up-to-date phoneloads, see the Cisco

Unified SRST 4.0 Supported Firmware, Platforms, Memory, and Voice Products at

http://www.cisco.com/en/US/customer/products/sw/voicesw/ps2169/prod_installation_guide09186

a00805f6f1b.html.

• If you have Cisco Unified CallManager already installed, verify that your version of Cisco Unified

CallManager is compatible with your Cisco Unified SRST release. See the “Cisco Unified

CallManager Compatibility” section on page 29.

Installing Cisco Unified CallManager

When installing Cisco Unified CallManager consider the following:

• Follow the installation instructions under the appropriate Cisco Unified CallManager version listed

at http://www.cisco.com/univercd/cc/td/doc/product/voice/c_callmg/index.htm.

• Integrate Cisco Unified SRST with Cisco Unified CallManager. Integration is performed from

Cisco Unified CallManager. See “Integrating Cisco Unified SRST with Cisco Unified CallManager”

section on page 32

Installing Cisco Unified SRST

Cisco Unified SRST versions have different installation instructions:

• Installing Cisco SRST V3.0 and Later, page 31

• Installing Cisco SRST V2.0 and V2.1, page 32

• Installing Cisco SRST V1.0, page 32

To update Cisco Unified SRST, follow the installation instructions described in this section.

Installing Cisco SRST V3.0 and Later

Install the Cisco IOS software release image containing the Cisco SRST or Cisco Unified SRST version

that is compatible with your Cisco Unified CallManager version. See the “Cisco Unified CallManager

Compatibility” section on page 29. Cisco IOS software can be downloaded from the Cisco Software

Center at http://www.cisco.com/public/sw-center/.