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That RFC also defines a SIP Parameters Internet Assigned Numbers Authority (IANA) registry to allow other RFC to provide more response codes. [1]: §27 [2] This list includes all the SIP response codes defined in IETF RFCs and registered in the SIP Parameters IANA registry as of 27 January 2023. This list also includes SIP response codes ...
SIP employs design elements similar to the HTTP request and response transaction model. [12] Each transaction consists of a client request that invokes a particular method or function on the server and at least one response. SIP reuses most of the header fields, encoding rules and status codes of HTTP, providing a readable text-based format.
MSRP syntax is similar to other IETF text based protocols such as SIP, HTTP and RTSP. MSRP requires a reliable transport layer, like TCP.Each message is either a request or a response and uses URIs; a message contains headers and a body that can carry any type of data, including binary information.
Jami (based on DHT and SIP) Savoir-faire Linux Inc. 2002 August Open Standard: 40-digit address Yes Yes Yes Yes No Yes Medium Yes Yes Yes Yes No Yes ? Jami (based on DHT and SIP) Matrix: Matrix.org 2014 Sep [11] [failed verification] Open standard @Username:Hostname (MXID) Yes Yes, mandatory Yes, default for private conversations [12] Yes Yes Yes
In the basic SIP specification, [15] only requests and final responses (i.e. 2XX response codes) are transmitted reliably, this is, they are retransmitted by the sender until the acknowledge message arrives (i.e. the corresponding response code to a request, or the ACK request corresponding to a 2XX response code).
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The latter introduces the concept of a presence server; all subscriptions are handled by this server. The message PUBLISH (RFC 3903) allows User Agents to inform the presence server about their subscription states. Presence documents. The presence information is coded in XML documents, that are carried in the bodies of the respective SIP ...
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