Specifications

Cisco Unified Survivable Remote Site Telephony Feature Roadmap
Feature Roadmap
7
Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide
Information About New Features in Cisco Unified SRST V4.0
Cisco Unified SRST Version 4.0 has introduced the following new features:
• Additional Cisco Unified IP Phone Support, page 8
• Cisco IP Communicator Support, page 8
• Fax passthrough using SCCP and ATAs Support, page 8
• H.323 VoIP Call Preservation Enhancements for WAN Link Failures, page 8
• Video Support, page 9
Version 1.0 12.1(5)YD1 Support was added for 144 Cisco IP phones on the Cisco 3660 multiservice
routers.
12.1(5)YD
• Cisco Unified SRST introduced on the Cisco 2600 series and
Cisco 3600 series multiservice routers and the Cisco IAD2420 series
integrated access devices.
• Cisco IP phones able to establish a connection with an SRST router in the
event of a WAN link to Cisco Unified CallManager failure.
• Dimming of all Cisco Unified IP Phone function keys that are not supported
during Cisco Unified SRST operation.
• Extension-to-extension dialing.
• Direct Inward Dialing (DID).
• Direct Outward Dialing (DOD).
• Calling party ID (Caller ID/ANI) display.
• Last number redial.
• Preservation of local extension-to-extension calls when WAN link fails.
• Preservation of local extension to PSTN calls when WAN link fails.
• Preservation of calls in progress when failed WAN link is reestablished.
• Blind transfer of calls within IP network.
• Multiple lines per Cisco IP phone.
• Multiple-line appearance across telephones.
• Call hold (shared lines).
• Analog Foreign Exchange Station (FXS) and Foreign Exchange Office (FXO)
ports.
• BRI support for EuroISDN.
• PRI support for NET5 switch type.
Table 2 Cisco Unified SRST Features by Cisco IOS Release (continued)
Cisco Unified SRST
Version Cisco IOS Release Modifications