Cisco 9971 - Survivable Remote Site Telephony

The End User Configuration window appears and the associated devices that you chose display in the Controlled
Devices pane.
Step 9
Choose Save Selected/Changes.
Survivable Remote Site Telephony
Survivable Remote Site Telephony (SRST) ensures that basic phone functions remain accessible when WAN
connectivity is lost. In this scenario, the phone can keep an in-progress call active, and the user can access a
subset of the features available. When failover occurs, the user receives an alert message on the phone.
SRST does not support IPv6.Note
For more information about supported firmware and Survivable Remote Site Telephony, see Cisco Unified
Survivable Remote Site Telephony Compatibility Information page on Cisco.com (http://www.cisco.com/c/
en/us/support/unified-communications/unified-survivable-remote-site-telephony/
products-device-support-tables-list.html).
The following table describes the availability of features during failover.
Table 14: SRST feature support
NotesSupportedFeature
YesNew Call
YesEnd Call
YesRedial
YesAnswer
YesHold
YesResume
YesConference
The Active Calls softkey does not display.NoConference to Active Calls (Join)
NoConference List
YesTransfer
NoTransfer to Active Calls (Direct
Transfer)
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 10.0
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Survivable Remote Site Telephony