application server
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... The scenarios below assume there is a SIP Proxy, application server,
or media gateway controller between the caller ...
... URI
convention tells the media server that the application server is
requesting it to act as a Focus. The conf-id value identifies the
particular focus instance.
...
... there is no conf-id present. However, such an operation may have
other operational issues, such as permissions and billing. Thus
an application server or proxy is a better place to do such an
operation. Moreover, such action would make the media server ...
... media server SHOULD authenticate the
application server or proxy. At a minimum, the media server MUST
...
... conference-framework [22] describes additional parameters and
behaviors of the Application Server. For example, the first INVITE
from P1 to the Application Server ...
... Application Server. For example, the first INVITE
from P1 to the Application Server would include the ";isfocus"
parameter; the Application Server ...
... Application Server would include the ";isfocus"
parameter; the Application Server would act as a Conference Factory;
and so on. However, none of that protocol machinery has an impact on
the operation of the Application Server ...
... Application Server would act as a Conference Factory;
and so on. However, none of that protocol machinery has an impact on
the operation of the Application Server to Media Server interface,
...
... Using the terminology of conference-framework [22], the Application
Server is the Conference Factory, and the Media Server is the
Conference Focus.
...
... call flow does not show any 100 TRYING messages
that would typically flow from the Application Server to the UACs;
nor does it show the ACKs ...
... nor does it show the ACKs from the UACs to the Application Server or
from the Application Server to the Media Server ...
... UAC, by the
UAC sending a BYE, or under the supervision of the Application
Server, by the Application Server issuing a BYE. In either case, the
Application Server ...
... UAC sending a BYE, or under the supervision of the Application
Server, by the Application Server issuing a BYE. In either case, the
Application Server will either issue a BYE on behalf of the UAC ...
... Application
Server, by the Application Server issuing a BYE. In either case, the
Application Server will either issue a BYE on behalf of the UAC or
issue it directly to the Media Server ...
...
It is left as a trivial exercise to the reader for how the
Application Server can mute legs, create side conferences, and so
forth.
...
... forth.
Note that the Application Server is a server to the participants
(UACs). However, the Application Server ...
... Application Server is a server to the participants
(UACs). However, the Application Server is a client for mixing
services ...
... service names, rather than fixed names. While this can work in a
closed network, where the Application Servers and Media Servers are
in the same administrative domain ...