User`s manual

Version 5.4 469 May 2008
SIP User's Manual 10. Media Server Capabilities
10 Media Server Capabilities
This section provides information on the device's media server capabilities:
 Multi-party conferencing (refer to ''Conference Server'' on page 469)
 Playing and recording Announcements (refer to ''Announcement Server'' on page 483)
 IP-to-IP Transcoding (refer to ''IP-to-IP Transcoding'' on page 494)
Note: This section is applicable only to Mediant 1000.
The device conference, transcoding, announcement and media server applications can be
used separately, each on a different platform, or all on the same device. The SIP URI
name in the INVITE message is used to identify the resource (media server, conference or
announcement) to which the SIP session is addressed.
The number of DSP channels that are allocated for IP conferences, transcoding and IP
announcements is determined by the parameter MediaChannels. Other DSP channels can
be used for PSTN media server.
The device SIP implementation is based on the decomposition model described in the
following IETF drafts:
 ‘A Multi-party Application Framework for SIP’ (draft-ietf-sipping-cc-framework-06.txt)
 ‘Models for Multi Party Conferencing in SIP’ (draft-ietf-sipping-conferencing-
framework-05.txt)
 ‘A Framework for Conferencing with the Session Initiation Protocol (SIP)’ (RFC 4353)
 ‘Basic Network Media Services with SIP’ (RFC 4240)
 ‘Media Server Control Markup Language (MSCML) and Protocol’ (draft-vandyke-
mscml-06.txt)
Note: To use the device's advanced Announcement capabilities, it's essential that
the ini file parameter AMSProfile be set to 1.
10.1 Conference Server
The device supports dial-in, multi-party conferencing. In conference applications, the
device functions as a centralized conference bridge. In ad-hoc or prearranged conferences,
users ‘invite’ the conference bridge. The conference bridge mixes the media and sends it to
all participants.
The device supports the following interfaces for conferencing:
 Simple, according to NetAnn (refer to ''Simple Conferencing (NetAnn)'' on page 470)
 Advanced, according to MSCML (refer to ''Advanced Conferencing (MSCML)'' on
page 472)
Note: The conference application is a special order option.