Cisco CP-7911G-CH1 System Administrator Manual page 51

Cisco Unified Survivable Remote Site Telephony Feature Roadmap
No Timeout for Call Preservation
To preserve existing H.323 calls on the branch in the event of an outage, disable the H.225 keepalive
timer by entering the no h225 timeout keepalive command. This feature is supported in Cisco IOS
Releases 12.3(7)T1 and higher versions. See the
section on page 11
H.323 is not supported with SIP phones.
RFC 2833 DTMF Relay Support
Cisco Skinny Client Control Protocol (SCCP) phones, such as those used with Cisco SRST systems,
provide only out-of-band DTMF digit indications. To enable SCCP phones to send digit information to
remote SIP-based IVR and voice-mail applications, Cisco SRST 3.2 and later versions provide
conversion from the out-of-band SCCP digit indication to the SIP standard for DTMF relay, which is
RFC 2833. You select this method in the SIP VoIP dial peer using the dtmf-relay rtp-nte command. See
the
configuration instructions.
To use voice mail on a SIP network that connects to a Cisco Unity Express system, use a nonstandard
SIP Notify format. To configure the Notify format, use the sip-notify keyword with the dtmf-relay
command. Using the sip-notify keyword may be required for backward compatibility with Cisco SRST
Versions 3.0 and 3.1.
Translation Profile Support
Cisco SRST 3.2 and later versions support translation profiles. Translation profiles allow you to group
translation rules together and to associate translation rules with the following:
•
•
•
See the
more information on the translation-profile command, see
Cisco Unified SRST and Cisco Unified SIP SRST Command Reference (All Versions).
OL-13143-04
for more information.
"How to Configure DTMF Relay for SIP Applications and Voice Mail" section on page 252
Called numbers
Calling numbers
Redirected called numbers
"Enabling Translation Profiles" section on page 140
Information About New Features in Cisco Unified SRST
"Cisco Unified SCCP and SIP SRST Feature Overview"
for more configuration information. For

Cisco Unified SCCP and SIP SRST System Administrator Guide
for
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