VoIP CODEC Types

Scope: The following will help you identify VoIP CODEC types when reading an SDP.

Types

Type	Name	Bitrate	Packet Size
0	PCMU / G.711u	8khz	64kpbs
8	PCMA / G.711a	8khz	64kbps
9*	G.722	16khz/32khz
13	CN / Comfort Noise	8khz	varies
18	G.729	8khz	8kbps
96*	Opus	48khz	varies
dynamic	ILBC	8khz	13.33 or 15.2kbps
101/126*	telephone-event (DTMF Tone)

* These types are dynamic and may be subject to change