Cisco Unified Survivable Remote Site Telephony Feature Roadmap
Information About New Features in Cisco Unified SRST
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Cisco Unified SCCP and SIP SRST System Administrator Guide
OL-13143-04
Cisco IP Communicator Support
Cisco IP Communicator is a software-based application that delivers enhanced telephony support on
personal computers. This SCCP-based application allows computers to function as IP phones, providing
high-quality voice calls on the road, in the office, or from wherever users may have access to the
corporate network. Cisco IP Communicator appears on a user's computer monitor as a graphical,
display-based IP phone with a color screen, a key pad, feature buttons, and soft keys.
Fax Passthrough using SCCP and ATAs Support
Fax passthrough mode is now supported using Cisco VG 224 voice gateways, Analog Telephone
Adaptors (ATA), and SCCP. ATAs ship with SIP firmware, so SCCP firmware must be loaded before this
feature can be used.
Note
For ATAs that are registered to a Cisco Unified SRST system to participate in FAX calls, they must have
their ConnectMode parameter set to use the “standard payload type 0/8” as the RTP payload type in FAX
passthrough mode. For ATAs used with Cisco Unified SRST 4.0 and higher versions, this is done by
setting bit 2 of the ConnectMode parameter to 1 on the ATA. For more
information, see the “Parameters
and Defaults” chapter in
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's
Guide for SCCP
.
H.323 VoIP Call Preservation Enhancements for WAN Link Failures for SCCP Phones
H.323 VoIP call preservation enhancements for WAN link failures sustains connectivity for H.323
topologies where signaling is handled by an entity, such as Cisco Unified Communications Manager,
that is different from the other endpoint and brokers signaling between the two connected parties.
Call preservation is useful when a gateway and the other endpoint (typically a Cisco Unified IP phone)
are collocated at the same site and the call agent is remote and therefore more likely to experience
connectivity failures. H.323 VoIP call preservation enhancements does not support SIP Phones.
For configuration information see the “Configuring H.323 Gateways” chapter in
Cisco IOS H.323 Configuration Guide
.
Video Support
This feature allows you to set video parameters for the Cisco Unified SRST to maintain close feature
parity with Cisco Unified CM. When the Cisco Unified SRST is enabled, Cisco Unified IP Phones do
not have to be reconfigured for video capabilities because all ephones retain the same configuration used
with Cisco Unified CM. However, you must enter call-manager-fallback configuration mode to set video
parameters for Cisco Unified SRST. The feature set for video is the same as that for Cisco Unified SRST
audio calls.
For more information, see the
“Setting Video Parameters” section on page 257
.
