Note that Annexes File and G do not introduce any new encodings. Receivers Should accept comfort and ease sound frames if restriction in their use hasn't been signaled. The MIME registrations for G729D and G729E in RFC 3555 [seven] specify a parameter that MAY be utilized with MIME or SDP https://jeffreybzmsg.newsbloger.com/27605962/the-5-second-trick-for-maret88-heylink