Which SIP request is used by Cisco Unified Communicatio…

Which SIP request is used by Cisco Unified Communications Manager to signal DND status
changes to a Cisco 9971 IP Phone?

A.
OPTIONS

B.
NOTIFY

C.
INFO

D.
REFER

E.
UPDATE

Explanation:
Cisco Unified Communications Manager supports Do Not Disturb that a SIP device initiates or that
a Cisco Unified Communications Manager device initiates. A DND status change gets signaled
from a SIP device to Cisco Unified Communications Manager by using the SIP PUBLISH method
(RFC3909). A DND status change gets signaled from a Cisco Unified Communications Manager

to a SIP device by using a dndupdate Remote-cc REFER request. Cisco Unified Communications
Manager can also publish the Do Not Disturb status for a device, along with the busy and idle
status for the device.

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/6_1_1/ccmfeat/cmfsgd611/fsdnd.html