Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
Applications
Cisco VCS Administrator Guide (X7.0)
Page 244 of 488
FindMe presence
When the Presentity Manager receives a request for information about the presences of a FindMe alias,
it looks up the presence information for each endpoint that makes up that FindMe alias. It then
aggregates this information as follows:
it looks up the presence information for each endpoint that makes up that FindMe alias. It then
aggregates this information as follows:
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If the FindMe alias is set to Individual mode, if any one of the endpoints making up that FindMe is in a
call the FindMe presentity’s status will be reported as in call.
call the FindMe presentity’s status will be reported as in call.
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If the FindMe alias is set to Group mode, if any one of the endpoints is online (i.e. not in call or offline)
then the FindMe presentity’s status will be reported as online.
then the FindMe presentity’s status will be reported as online.
Registration refresh period
The PUA will update and publish presence information on receipt of:
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a registration request (for new registrations)
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a registration refresh (for existing registrations)
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a deregistration request
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call setup and cleardown information
For non-traversal H.323 registrations the default registration refresh period is 30 minutes. This means
that when the PUA is enabled on a VCS with existing registrations, it may take up to 30 minutes before
an H.323 registration refresh is received and available presence information is published for that
endpoint.
that when the PUA is enabled on a VCS with existing registrations, it may take up to 30 minutes before
an H.323 registration refresh is received and available presence information is published for that
endpoint.
It also means that if an H.323 endpoint becomes unavailable without sending a deregistration message,
it may take up to 30 minutes for its status to change to offline. To ensure more timely publication of
presence information for H.323 endpoints, you should decrease the H.323 registration refresh period
(using
it may take up to 30 minutes for its status to change to offline. To ensure more timely publication of
presence information for H.323 endpoints, you should decrease the H.323 registration refresh period
(using
VCS configuration > Protocols > H.323 > Gatekeeper > Time to live
).
The default registration refresh period for SIP is 60 seconds, so it will take no more than a minute for the
PUA to publish updated presence information on behalf of any SIP endpoints.
PUA to publish updated presence information on behalf of any SIP endpoints.
Configuring Presence
The
Presence
page (
Applications > Presence
) allows you to enable and configure Presence services
on the VCS.
These services can be enabled and disabled separately from each other, depending on the nature of your
deployment. Both are disabled by default.
deployment. Both are disabled by default.
Note that SIP mode must be enabled for the Presence services to function.
Presence User Agent (PUA)
The PUA provides presence information on behalf of registered endpoints.
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Enabled: if the PUA is enabled, it will publish presence information for all locally registered endpoints,
whether or not those endpoints are also publishing their own presence information. Information
published by the PUA will be routed to a Presence Server acting for the endpoint’s domain. This could
whether or not those endpoints are also publishing their own presence information. Information
published by the PUA will be routed to a Presence Server acting for the endpoint’s domain. This could