Cisco Cisco TelePresence Video Communication Server Expressway
Enabling Lync clients to see presence status of endpoints registered on Cisco VCS Control
Cisco VCS Deployment Guide: Microsoft Lync 2010 and Cisco VCS X6.1
Page 42 of 81
Enabling Lync clients to see presence status of
endpoints registered on Cisco VCS Control
endpoints registered on Cisco VCS Control
Using SIP-SIMPLE, Lync Server 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 Lync Server.
is limited to buddies indicating “gray” (not available), or “green” (available). “In-call” and other rich
presence states are not handled by Lync Server.
Lync Server 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 Lync Server.
SIP-SIMPLE and so no presence information can be supplied to endpoints registered on Cisco
VCS about endpoints registered on Lync Server.
Lync clients registered to Lync Server can see the presence status of other Lync clients registered
to Lync Server.
to Lync Server.
Endpoints registered to Cisco VCS Control can see the presence status of other endpoints
registered to Cisco VCS Control.
registered to Cisco VCS Control.
In summary:
… to Cisco VCS
… to Lync
Cisco VCS to …
(no OCS Relay)
(no OCS Relay)
Full presence available
Presence = Available only
Cisco VCS to …
(with OCS Relay)
(with OCS Relay)
Full presence available
Presence = Available and In-Call
Lync 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.
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 generate it on their behalf by enabling the PUA (Presence
User Agent):
information, the Cisco VCS Control can generate it on their behalf 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 supplies the “highest interest” presence information
available, for example “in-call” is 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.
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 supplies the “highest interest” presence information
available, for example “in-call” is 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.
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 User Agent
On (if Cisco VCS Control is to generate presence information
for registered endpoints)
for registered endpoints)