Cisco TelePresence Video Communication Server Administrator's Manual page 291

Reference material
Applications OCS Relay OCS Routing Prefix: <S:0,128>
Prefix applied to the SIP domain of requests destined for OCS. This prefix is used by the VCS search rules to
route the requests via the appropriate neighbor zone to the Microsoft Office Communications Server.
Default: ocs
Example: xConfiguration Applications OCS Relay OCS Routing Prefix: "ocs"
Applications Presence Server Mode: <On/Off>
Enables and disables the SIMPLE Presence Server. Note: SIP mode must also be enabled for the Presence
Server to function.
Default: Off
Example: xConfiguration Applications Presence Server Mode: On
Applications Presence Server Publication ExpireDelta: <30..7200>
Specifies the maximum time (in seconds) within which a publisher must refresh its publication.
Default: 1800
Example: xConfiguration Applications Presence Server Publication ExpireDelta:
1800
Applications Presence Server Subscription ExpireDelta: <30..7200>
Specifies the maximum time (in seconds) within which a subscriber must refresh its subscription.
Default: 3600
Example: xConfiguration Applications Presence Server Subscription ExpireDelta:
3600
Applications Presence User Agent ExpireDelta: <1..65534>
Specifies the lifetime value (in seconds) the Presence User Agent will advertise in the PUBLISH messages it
sends to the Presence Server. The Presence User Agent will refresh its PUBLISH messages at 75% of this
value (to keep them active). The Presence Server may reduce this value in its responses.
Default: 3600
Example: xConfiguration Applications Presence User Agent ExpireDelta: 3600
Applications Presence User Agent Mode: <On/Off>
Enables and disables the SIMPLE Presence User Agent (PUA). The PUA provides presence information on
behalf of registered endpoints. SIP mode must also be enabled for the PUA to function.
Default: Off
Example: xConfiguration Applications Presence User Agent Mode: Off
Applications Presence User Agent RetryDelta: <1..65534>
Specifies the time (in seconds) after which the Presence User Agent will attempt to resend a PUBLISH to the
Presence Server. This will occur if the original attempt failed due to resource issues or other transitory errors.
Default: 1800
Example: xConfiguration Applications Presence User Agent RetryDelta: 1800
Cisco VCS Administrator Guide (X6.1) Page 291 of 401