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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
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.
UNDERSTANDING SIP TRACES - Cisco Community
https://community.cisco.com/t5/collaboration-voice-and-video/understanding-sip-traces/ta-p/3137704
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. The profile numbers are explained below . 18=G729. 0=PCMU. 8=PCMA. 101=rtp-nte payload . DISSECTING A SIP TRACE
Understanding Media In SIP Session Description Protocol ...
https://teraquant.com/understand-media-sip-session-description-protocol/
The <m> field in the screenshot above, is used to indicate that audio is the payload and also the UDP port number used by the RTP. a=rtpmap:<payload type> <encoding name>/<clock rate> [/<encoding parameters>] This attribute provides more details such as encoding, clock rate and encoding parameters of the payload type used in the “m=” line.
SIP Port Numbers used by Providers - WhichVoIP
https://www.whichvoip.com/articles/sip-port-numbers-by-provider.htm
The MagicJack SIP ports used are as follows, though good luck finding in-depth information for this on their website: SIP Control: Port 5060 and 5070 UDP. Audio (RTP): Ports 10000 to 65535 (random) Ooma. Ooma is another low cost provider. The ports Ooma uses are as follows: SIP Control: Port 53, 123, 514, 1194, 3386, 3480 UDP.
Port Ranges for Supported SIP and VoIP ... - WIN-911 Support
https://supportdesk.win911.com/support/solutions/articles/24000038761-port-ranges-for-supported-sip-and-voip-providers
UDP Port 5060 is for SIP communication. UDP Port 5060-5082 range, SIP communications. TCP Port 5060 is for SIP but thought to be rarely used. UDP Port 10000 - 20000 is for RTP - the media stream, voice/video channel. Port ranges for the Call manager can be found in the Cisco Unified CM site. Port ranges for OpenSER (Kamailio):
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
Each media line describes the transport protocol port (e.g. UDP for audio) where e.g. audio shall be received. So in your example the sender of the SDP message wants to receive packets on port 47038. Additionally we RTP to transmit information. AVP stands for audio video profile (see Wikipedia). In RTP we've a range of predefined codec numbers ...
Troubleshooting Tip: One way Audio issue in VOIP c ...
https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-One-way-Audio-issue-in-VOIP-calls-caused-by/ta-p/203336
Description This article describes how SIP ALG processes VoIP traffic and how it causes one-way audio issues. Scope Solution SIP ALG translates SIP and SDP parameters when the packet is sent to the SIP provider. Most of the SIP providers recommend disabling SIP ALG. Why SIP ALG is …
Understanding Session Description Protocol (SDP) | Tao ...
https://andrewjprokop.wordpress.com/2013/09/30/understanding-session-description-protocol-sdp/
It can support three audio codecs and one video codec. The audio codecs are G.711 uLaw (PCMU), G.711 aLaw (PCMA), and iLBC. The audio codecs will use port 49170 and all have a sample rate of 8000 Hz. The video codec is H.261 on port 51327. 99.9% of the time I can safely ignore any of the other SDP values that might be present.
SIP Protocol: What Is & How It Works in a VOIP Call ...
https://www.softwareadvice.com/resources/what-is-sip/
SIP is an application layer protocol and the foundation of modern interactive communications over the internet (voice calls, video calls, etc.). What is SIP used for? SIP is a media-independent protocol—it’s not voice, it’s not video, it’s not data—it could be anything. While it’s mostly applied to VoIP, it’s not a VoIP protocol.
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