This profile defines aspects of RTP left unspecified in the RTP Version 2 protocol definition (RFC 1889). This profile is intended for the use within audio and video conferences with minimal session control. In particular, no support for the negotiation of parameters or membership control is provided. The profile is expected to be useful in sessions where no negotiation or membership control are used (e.g., using the static payload types and the membership indications provided by RTCP), but this profile may also be useful in conjunction with a higher-level control protocol.
Use of this profile occurs by use of the appropriate applications; there is no explicit indication by port number, protocol identifier or the like.
Other profiles may make different choices for the items specified here.