User`s manual

Version 5.4 473 May 2008
SIP User's Manual 10. Media Server Capabilities
Figure 10-2: Advanced Conferencing SIP Call Flow
10.1.2.2 Joining a Conference
To join an existing conference, the Application Server sends a SIP INVITE message with
the same Request-URI as the one that created the conference. The INVITE message may
include a <configure_leg> MSCML request body. If not included, defaults are used for that
leg attributes.
The <configure_leg> can include the following attributes:
 Id: identification number of the MSCML request. This is used to correlate between
MSCML requests and responses.
 Type: Talker / Listener. If set to Listener, the incoming RTP from that leg does not
participate in the conference mix. The default is Talker.
 Mixmode:
• Full: RTP from this leg participates in the mix (default).
• Mute: RTP from this leg is not participating in the mix.