Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
Protocols
This section provides information about how to configure the VCS to support the SIP and H.323 protocols.
About H.323
The VCS supports the H.323 protocol: it is an H.323 gatekeeper.
between H.323 and SIP, translating between the two protocols to enable endpoints
that only support one of these protocols to call each other. In order to support H.323, the H.323 mode must be
enabled.
enabled.
Using the VCS as an H.323 Gatekeeper
As an H.323 gatekeeper, the VCS accepts registrations from H.323 endpoints and provides call control functions such
as address translation and admission control.
as address translation and admission control.
To enable the VCS as an H.323 gatekeeper, you must ensure that H.323 mode is set to On (Configuration > Protocols
> H.323).
> H.323).
Note that this is the default setting, so the VCS will work as an H.323 gatekeeper "out of the box", without any other
special configuration.
special configuration.
H.323 Endpoint Registration
H.323 endpoints in your network must register with the VCS in order to use it as their gatekeeper.
There are two ways an H.323 endpoint can locate a VCS with which to register: manually or automatically. The option
is configured on the endpoint itself under the Gatekeeper Discovery setting (consult your endpoint manual for how to
access this setting).
is configured on the endpoint itself under the Gatekeeper Discovery setting (consult your endpoint manual for how to
access this setting).
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If the mode is set to automatic, the endpoint will try to register with any VCS it can find. It does this by sending
out a Gatekeeper Discovery Request, to which eligible VCSs will respond.
out a Gatekeeper Discovery Request, to which eligible VCSs will respond.
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If the mode is set to manual, you must specify the IP address of the VCS with which you want your endpoint to
register, and the endpoint will attempt to register with that VCS only.
register, and the endpoint will attempt to register with that VCS only.
Preventing Automatic H.323 Registrations
You can prevent H.323 endpoints being able to register automatically with the VCS by disabling Auto Discovery on
the VCS (Configuration > Protocols > H.323).
the VCS (Configuration > Protocols > H.323).
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