Release Notes for Cisco Unified Survivable Remote Site Telephony, 12.6

Memory Requirements

The Cisco 4000 Series Integrated Services Router platforms require 4 GB of DRAM.

Hardware Supported

Platforms

The following Cisco 4000 Series Integrated Services Router platforms are supported:

• Cisco 4321 Integrated Services Router
• Cisco 4331 Integrated Services Router
• Cisco 4351 Integrated Services Router
• Cisco 4431 Integrated Services Router
• Cisco 4451 Integrated Services Router
• Cisco 4461 Integrated Services Router (Supported from Cisco IOS XE Gibraltar 16.10.1 Release)

Software Compatibility

For more information on supported images and minimum software version requirement for Unified SRST features, see Cisco Unified SCCP and SIP SRST System Administrator Guide.

To determine the correct Cisco IOS release to support a specific Unified SRST version, see the Cisco Unified CME, Unified SRST, and Cisco IOS Software Version Compatibility Matrix.

Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. You do not need an account on Cisco.com for access.

Determining the Software Version

To determine the release of Cisco IOS software currently running on your Cisco router, log in to the router and enter the show version command. The following sample output from the show version command indicates the Cisco IOS release on the first output line:

Upgrading to a New Software Release

To determine which Cisco IOS software release supports the recommended Unified SRST version, see Unified SRST and Cisco IOS Software Compatibility Matrix. To install the new software release, see the “Install Cisco IOS Software” section of the Cisco Unified Communications Manager Express Administrator Guide.

Feature Set Tables

Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn.

Changed Information for Unified SRST, 12.6

From Unified SRST Release 12.6 (Cisco IOS XE Gibraltar 16.11.1a), the following changes are applicable to Unified SRST:

• Deprecation of CLI Commands under Call-Manager-Fallback Configuration Mode

Deprecation of CLI Commands under Call-Manager-Fallback Configuration Mode

For information on the list of CLI commands that are not supported on Unified SRST Release12.6 and later releases as part of security enhancement, see Cisco Unified SCCP and SIP SRST System Administrator Guide (All Versions) .

New Features in Unified SRST, Release 12.6

• Support for Toll Fraud Prevention for Line Side SIP on Unified SRST and Unified E-SRST
• Support for Unified SRST, Unified E-SRST, and Unified Secure SRST Password Policy
• Support for SNMP Version 3 (SNMPv3) on Unified SRST
• Support for Specific License Reservation (SLR)

Support for Toll Fraud Prevention for Line Side SIP on Unified SRST and Unified E-SRST

For information on configuring toll fraud prevention for line side SIP on Unified SRST, see Cisco Unified SCCP and SIP SRST System Administrator Guide (All Versions) .

Support for Unified SRST, Unified E-SRST, and Unified Secure SRST Password Policy

For information on the new Unified SRST, Unified E-SRST, and Unified Secure SRST password policy, see Cisco Unified SCCP and SIP SRST System Administrator Guide (All Versions) .

Support for SNMP Version 3 (SNMPv3) on Unified SRST

For information on support for Simple Network Management Protocol Version 3 (SNMPv3) on Unified SRST, see Cisco Unified SCCP and SIP SRST System Administrator Guide (All Versions) .

Support for Specific License Reservation (SLR)

From Cisco IOS XE Gibraltar 16.12.1 (Unified SRST/Unified E-SRST12.6), Specific License Reservation (SLR) is supported on Cisco 4000 Series Integrated Services Routers. For more information, see Cisco Unified SCCP and SIP SRST System Administrator Guide (All Versions) .

Open Caveats—Unified SRST, Release 12.6

Unified Secure SRST 12.6 (Cisco IOS XE Gibraltar 16.11.1a Release) is not a recommended release version for:

• Unified Secure SCCP SRST and secure call flows that include stcapp configuration
• Multicast Music On Hold

The following are the open or unresolved caveats for Unified SRST, 12.6 Release in Cisco IOS XE Gibraltar 16.11.1a Release.

The following are the open or unresolved caveats for Unified SRST, 12.6 Release in Cisco IOS XE Gibraltar 16.12.1 Release.

Software Documents

Administrator Guides

• Cisco Unified Communications Manager Express System Administrator Guide
• Cisco Unified SCCP and SIP SRST System Administrator Guide (All Versions)
• Phone Feature Support Guide for Unified CME, Unified SRST, Unified E-SRST, and Unified Secure SRST

Command References

• Cisco Unified Communications Manager Express Command Reference
• Cisco Unified SRST and Cisco Unified SIP SRST Command Reference (All Versions)

Release Notes

• Release Notes for Cisco Unified Communications Manager Express

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Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

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