(File created 2013-01-17, last updated 2013-02-25) Type name: audio Subtype name: rtploopback Required parameters: rate:RTP timestamp clock rate, which is equal to the sampling rate. The typical rate is 8000; other rates may be specified. This is specified by the loop back source, and reflected by the mirror. Optional parameters: none Encoding considerations: This media type is framed. Security considerations: See Section 12 of [RFC6849]. Interoperability considerations: none Published specification: [RFC6849]. Applications which use this media type: Applications wishing to monitor and ensure the quality of transport to the edge of a given VoIP Service. Additional information: none Contact: the authors of [RFC6849]. Intended usage: LIMITED USE Restrictions on usage: This media type depends on RTP framing, and hence is only defined for transfer via RTP. Transfer within other framing protocols is not defined at this time. Author: Kaynam Hedayat. Change controller: IETF PAYLOAD working group delegated from the IESG.