Manual

Enabling MOC clients to see the presence status of endpoints registered on Cisco VCS Control
Enabling MOC clients to see the presence
status of endpoints registered on Cisco VCS
Control
 Using SIP-SIMPLE, OCS only supports the reception of the “available” status, so presence is
limited to buddies indicating “gray” (not available), or “green” (available). “In-call” and other rich
presence states are not handled by OCS.
 OCS does not supply presence status information about its registered endpoints using SIP-
SIMPLE and so no presence information can be supplied to endpoints registered on Cisco VCS
about endpoints registered on OCS.
 MOC clients registered to OCS can see the presence status of other MOC clients registered to
OCS.
 Endpoints registered to Cisco VCS Control can see the presence status of other endpoints
registered to Cisco VCS Control.
In summary:
… to Cisco VCS … to OCS
Cisco VCS to …
(no OCS Relay)
Full presence available Presence = Available only
Cisco VCS to …
(with OCS Relay)
Full presence available Presence = Available and In-Call
OCS to …
No presence information available Full presence available
Cisco VCS configuration
If endpoints registered to the Cisco VCS Control supply their own presence information the Cisco VCS
Control can be configured to be a Presence Server, aggregating presence information and providing
presence status to users who subscribe for the information.
If endpoints registered to the Cisco VCS Control do not support the generation of presence
information, the Cisco VCS Control can be asked to generate it by enabling the PUA (Presence User
Agent):
 Cisco VCS PUA generates Presence = available if endpoint is registered
 Cisco VCS PUA generates Presence = In-call if the endpoint is in a call
If an endpoint generates presence and the PUA is enabled, the Cisco VCS Presence Server will
aggregate both results – if there are results from the PUA plus just one other Presence Publisher, the
Presence Server deems the PUA to be monitoring the other publisher, so the other publisher’s status
always wins – otherwise the Presence Server will supply the “highest interest” presence information
available, for example “in-call” will be reported in preference to “on-line”. The Presence Server also
supports richer presence information – such as “Busy, in a meeting” – which may be supplied by the
endpoint.
Note: For H.323 devices to supply presence (via the PUA) the registered H323 ID of that endpoint
must resemble a SIP URI. The presence will be published for that URI.
To configure presence on the Cisco VCS Control:
1. Go to the Presence page Applications > Presence.
2. Configure the following fields:
SIP SIMPLE Presence Server On
Cisco VCS Deployment Guide: Microsoft OCS 2007 R1 and R2 and Cisco VCS X5.2 Page 55 of 92