Specifications

Cisco Unified Survivable Remote Site Telephony Feature Roadmap
Feature Roadmap
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Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide
Secure SRST
Secure Cisco IP phones that are located at remote sites and that are attached to gateway routers can
communicate securely with Cisco Unified CallManager using the WAN. But if the WAN link or
Cisco Unified CallManager goes down, all communication through the remote phones becomes
nonsecure. To overcome this situation, gateway routers can now function in secure SRST mode, which
activates when the WAN link or Cisco Unified CallManager goes down. When the WAN link or
Cisco Unified CallManager is restored, Cisco Unified CallManager resumes secure call-handling
capabilities.
Secure SRST provides new SRST security features such as authentication, integrity, and media
encryption. Authentication provides assurance to one party that another party is whom it claims to be.
Integrity provides assurance that the given data has not been altered between the entities. Encryption
implies confidentiality; that is, that no one can read the data except the intended recipient. These security
features allow privacy for SRST voice calls and protect against voice security violations and identity
theft. For more information see the chapter “Setting Up Secure Survivable Remote Site Telephony”
section on page 105.
Cisco Unified IP Phone 7970G and Cisco Unified 7971G-GE Support
The Cisco Unified IP Phones 7970G and 7971G-GE are full-featured telephones that provide voice
communication over an IP network. They function much like a traditional analog telephones, allowing
you to place and receive phone calls and to access features such as mute, hold, transfer, speed dial, call
forward, and more. In addition, because the phones are connected to your data network, they offer
enhanced IP telephony features, including access to network information and services, and
customizeable features and services. The phones also support security features that include file
authentication, device authentication, signaling encryption, and media encryption.
The Cisco Unified IP Phones 7970G and 7971G-GE also provide a color touchscreen, support for up to
eight line or speed-dial numbers, context-sensitive online help for buttons and feature, and a variety of
other sophisticated functions. No configurations specific to SRST are necessary.
For more information, see the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/voice/c_ipphon/english/ipp7970/index.htm
Note The Cisco Unified IP Phone 7914 Expansion Module can attach to your Cisco Unified IP Phones 7970G
and 7971G-GE. See Cisco Unified IP Phone Expansion Module 7914 Support, page 19 for more
information.
Enhancement to the show ephone Command
The show ephone command has been enhanced to display the configuration and status of the
Cisco Unified IP Phone 7970G and Cisco Unified IP Phone 7971G-GE. For more information, see the
show ephone command in the Cisco Unified Survivable Remote Site Telephony (SRST) Command
Reference (All Versions).
Information About New Features in Cisco SRST V3.2
Cisco SRST V3.2 introduced the new features described in the following sections:
• Enhancement to the alias Command