Renegotiates the media description. Only one negotiation can be outstanding at any time. The session should be in the Connected state for this method to work.

Renegotiates the media description with the specified participant. Only one negotiation can be outstanding with any participant at any time. The participant should be part of the session for this method to succeed. The participant cannot be a local participant. A given topology may not allow the exchange of descriptions with certain participants.

Renegotiates the media description. Only one negotiation can be outstanding at any time. The session should be in the Connected state for this method to work.