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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.
[MS-SDP]: Audio/Video Encryption | Microsoft Docs
https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-sdp/c48d8b88-ac53-4a1b-929b-8c6cbbb3b191
If encryption is required, SDP signaling MUST carry a media-level attribute as shown in the following. m=audio 49170 RTP/AVP 0 a=encryption:required. If encryption is supported but not required, SDP signaling MUST carry a media-level attribute as shown in the following: m=audio 49170 RTP/AVP 0 a=encryption:optional.
Modifying the m and a lines in SDP using SIP Message ...
https://support.sonus.net/display/UXDOC70/Modifying+the+m+and+a+lines+in+SDP+using+SIP+Message+Manipulation
In this particular instance, an incoming SDP used 116 for the DTMF event instead of the standard 101. The SMM configuration below repairs both the media (m line) and the attributes (a line) to modify 116 to 101. m=audio 28048 RTP/AVP 18 116 c=IN IP4 41.87.234.68 a=rtpmap:18 G729/8000 a=rtpmap:116 telephone-event/8000
sip - Using SDP media type application with RTP/AVP (m ...
https://stackoverflow.com/questions/48015713/using-sdp-media-type-application-with-rtp-avp-m-application-port-rtp-avp-p
is the media type. Currently defined media are "audio", "video", "text", "application", and "message", although this list may be extended in the future (see Section 8). Application-specific messages can also be sent over RTP, in your case the. m=application …
M-Audio
Manufacturers of MIDI and audio devices for the PC or Mac. Product catalog, company information, news and support center.
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