Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
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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.
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.
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 Configuration > Protocols > H.323
> Gatekeeper > Time to live).
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 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.
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 be the local Presence Server,
or (if this is disabled) a Presence Server on another system that is authoritative for that domain.
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 be the local Presence Server,
or (if this is disabled) a Presence Server on another system that is authoritative for that domain.
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Disabled: if the PUA is disabled, only those endpoints that support presence will publish presence information.
No information will be available for endpoints that do not support presence.
No information will be available for endpoints that do not support presence.
You can also configure the Default published status for registered endpoints. This is the presentity status
published by the Presence User Agent for registered endpoints when they are not "In-Call". The options are either
Online or Offline. Note that:
published by the Presence User Agent for registered endpoints when they are not "In-Call". The options are either
Online or Offline. Note that:
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If this is set to Online, any permanently registered video endpoints and FindMe entries that include those
endpoints will appear as permanently "Online".
endpoints will appear as permanently "Online".
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The status of non-registered endpoints always appears as "Offline".
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"Online" status appears as "Available" in Lync clients.
Presence Server
The Presence Server manages the presence information for all presentities in the SIP domains for which the VCS is
authoritative.
authoritative.
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Cisco TelePresence Video Communication Server Administrator Guide