Hi, Everyone:
I am enclosing Ben's questions to the SG16 members for their answer because I believe that there are many members who might better insights for taking part in H.323 development.
Best regards, Radhika R. Roy AT&T +1 732 420 1580
-----Original Message----- From: ben-w@jlonline.com [SMTP:ben-w@jlonline.com] Sent: Thursday, December 09, 1999 4:09 AM To: Roy, Radhika R, ALARC Subject: H.323 questiones
Hi Mr.Radhika , I have some questiones about Ad Hoc Conference defined in ITU-T Recommendation H.323.
H.323 Section 8.4.3.1 states:
Endpoint 1 creates a conference with Endpoint 2 as follows: A1) Endpoint 1 sends a Setup message to Endpoint 2 containing aglobally unique CID ? N and conferenceGoal = create according to the procedure in 8.1. A2) Endpoint 2 has the following options: .... A2d) If Endpoint 2 is an MC(U) that hosts multiple conferences and wishes to provide Endpoint 1 with a choice of conferences to join, it can send a Facility message indicating conferenceListChoice and a list of conferences that Endpoint 1 may choose from. The list of conferences is sent as part of the Facility- UUIE. For backward compatibility, with version 1 endpoints, conference lists are only provided if the protocolIdentifier in Endpoint 1's Setup message indicates that it is version 2 or above.
Upon receipt of this conferenceListChoice Facility message,Endpoint 1 may join a conference from the list of conferences by sending a new Setup message to the MC(U) on the Call Signalling Channel which contains the selected CID and which has conferenceGoal = join. If Endpoint 1 chooses not to join any of the listed conferences, it shall send a Release Complete message to the MC(U).
When EndPoint 1 calling EndPoint 2(MCU),MCU "wishes to provideEndpoint 1 ...",what does it mean?Can't any endpoint get a list of conferences?What decides it's wish? CUSeeMe Pro and NetMeeting get diferent list of conferences from MeetingPoint(MCU), I called MeetingPoint too,but I can't get a list of conferences,I connected with it just like an endpoint.Why?Does it mean I have created a new conference in a MCU?! 2. If an EndPoint is a standard H.323 client,and MCU provide it with a list conferences,then it has only two choices: join or release.It means the EndPoint can't create a conference!How to create a conference in a MCU?Who is the initiator? 3. If I want to learn details about MCU calling procedures,what other protocols should I study?
The questiones puzzle me,can you help me ?
Thanks, Ben. email: ben-w@jlonline.com mailto:ben-w@jlonline.com