该协议可以用于开始会话、邀请成员参加由其他方式做广告的会话，或者利用多点控制器开始多方通话。

The protocol may be used to initiate sessions, invite members to sessions advertised by other means or initiate multiparty calls using a multipoint control unit.

youdao

本协议可用于两个低比特率多媒体终端之间，或一个低比特率多媒体终端与一个多点控制单元或一个交互操作适配器之间。

This protocol can be used between two low bit rate multimedia terminals, or between a low bit rate multimedia terminal and a multipoint control unit or an interworking adapter.

youdao

本协议可用于两个低比特率多媒体终端之间，或一个低比特率多媒体终端与一个多点控制单元或一个交互操作适配器之间。

This protocol can be used between two low bit rate multimedia terminals, or between a low bit rate multimedia terminal and a multipoint control unit or an interworking adapter.

youdao