Specifications

Overview of Cisco Unified SRST

Support for Cisco Unified IP Phones, Platforms, Cisco Unified CallManager, Signals, Languages, and Switches

Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide

Note During Cisco Unified CallManager fallback, Cisco Unified SRST considers the Cisco VG248 to be a

group of Cisco Unified IP Phones. Cisco Unified SRST counts each of the 48 ports on the Cisco VG248

as a separate Cisco IP phone. Support for Cisco VG248 Version 1.2(1) and higher is available as of

Cisco SRST Version 2.1. For more information, see the Cisco VG248 Analog Phone Gateway Data Sheet

and the Cisco VG248 Analog Phone Gateway Version 1.2(1) Release Notes.

Platform and Memory Support

For the most up-to-date information about the maximum number of Cisco Unified IP Phones, maximum

DNs or virtual voice ports, and memory requirements for Cisco Unified SRST, 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_guide09186a00

805f6f1b.html.

Determining Platform Support Through Cisco Feature Navigator

Cisco IOS software is packaged in feature sets that are supported on specific platforms. To get updated

information regarding platform support for this feature, access Cisco Feature Navigator. Cisco Feature

Navigator dynamically updates the list of supported platforms as new platform support is added for the

feature.

Availability of Cisco IOS Software Images

Platform support for particular Cisco IOS software releases is dependent on the availability of the

software images for those platforms. Software images for some platforms may be deferred, delayed, or

changed without prior notice. For updated information about platform support and availability of

software images for each Cisco IOS software release, see the online release notes or, if supported,

Cisco Feature Navigator.

Note For the most up-to-date information about Cisco IOS software images, 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_guide09186a00

805f6f1b.html.

Cisco Unified CallManager Compatibility

See the Cisco Unified CallManager Compatibility Matrix.

Signal Support

Cisco Unified SRST supports FXS, FXO, T1, E1, and E1 R2 signals.