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Description of Media parameter in SIP "m=audio 12548 …
https://stackoverflow.com/questions/27869523/description-of-media-parameter-in-sip-m-audio-12548-rtp-avp-0-8-101
1 Answer1. Show activity on this post. It's a field from SDP protocol, describing parameters of media ("m" is for "media"). Next, type of media is "audio", not video, for example. (m=audio). 12548 is a port address for streaming media. "RTP/AVP" means "RTP Audio/Video Profile" and representing one of RTP profiles, which are coded by 0, 8 and ...
Session Description Protocol (SDP) Negotiation With ...
https://teraquant.com/session-description-protocol-negotiation-examples/
Take the case of an offer SDP which has one line of “m” containing payload types of 18 0 101: m=audio 40024 RTP/AVP 18 0 101 c=IN IP4 123.102.11.175 a=rtpmap: 18 G729/8000 a=rtpmap: 0 PCMU/8000 a=rtpmap: 101 telephone-event/8000 a=sendrecv. In case the answerer does not support any of these codes, the call would fail.
Understanding Media In SIP Session Description Protocol ...
https://teraquant.com/understand-media-sip-session-description-protocol/
m=audio 49230 RTP/AVP 18 96 97 98 a= rtpmap:18 G729/8000/1 a=rtpmap:96 L8/8000 a=rtpmap:97 L16/8000 a=rtpmap:98 L16/11025/2 a=fmtp:18 annexb=yes During the early stages of RTP development, statically assigned payload types (0-34) were used to bind encodings to payload types.
UNDERSTANDING SIP TRACES - Cisco Community
https://community.cisco.com/t5/collaboration-voice-and-video/understanding-sip-traces/ta-p/3137704
m=audio 25268 RTP/AVP 18 0 8 101 . This line defines the media attribtes that will be used for the call. Audio: means that this is an Audio call, we can also have m=video in case of a Video call. 25268: Is the dynamic RTP port used for the call. RTP/AVP: Represents the RTP/AVP profile number for each of the profiles listed.
RFC 6871 - Session Description Protocol (SDP) Media ...
https://tools.ietf.org/html/rfc6871
If the preferred configuration is selected, the SDP answer will look like the following v=0 o=- 25678 753849 IN IP4 192.0.2.1 s= c=IN IP4 192.0.2.1 t=0 0 a=csup:med-v0 m=audio 3456 RTP/AVP 18 100 a=rtpmap:100 telephone-event/8000 a=fmtp:100 0-15 a=acfg:1 m=2,3 pt=1:0,2:18,3:100 Gilman, et al. Standards Track [Page 28]
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