Notes
Supported
Feature
Yes
Resume
3 way only and local mixing only.
Yes
Conference
No
Conference List
Consult only.
Yes
Transfer
No
Transfer to Active Calls (Direct
Transfer)
Yes
Auto Answer
Yes
Call Waiting
Yes
Caller ID
Conference is the only feature supported due
to other feature limitations.
Yes
Unified Session Presentation
Voicemail will not be synchronized with
other users in the Cisco Unified
Communications Manager cluster.
Yes
Voicemail
Forward state is only available on the phone
that sets the forward because there are no
shared line appearances in SRST mode. The
Call Forward All settings are not preserved
on failover to SRST from the Cisco Unified
Communications Manager, or from SRST
fail-back to the Communications Manager.
Any original Call Forward All still active on
the Communications Manager should be
indicated when the device reconnects to the
Communications Manager after failover.
Yes
Call Forward All
Yes
Speed Dial
The iDivert softkey does not display.
No
To Voicemail (iDivert)
Lines are supported but cannot be shared.
Partial
Line Filters
The Park softkey does not display.
No
Park Monitoring
Message count badges do not appear on the
phone screen.
Only the Message Waiting icon displays.
No
Enhanced Message Waiting
Indication
Cisco IP Phone 7800 Series Administration Guide for Cisco Unified Communications Manager
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Surviveable Remote Site Telephony