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The SIP response codes and corresponding reason phrases were initially defined in RFC 3261. [1] 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]
RFC 3261: INVITE: Initiate a dialog for establishing a call. The request is sent by a user agent client to a user agent server. When sent during an established dialog (reinvite) it modifies the sessions, for example placing a call on hold. RFC 3261: ACK: Confirm that an entity has received a final response to an INVITE request. RFC 3261: BYE
The SIP URI scheme is a Uniform Resource Identifier (URI) scheme for the Session Initiation Protocol (SIP) multimedia communications protocol. A SIP address is a URI that addresses a specific telephone extension on a voice over IP system. Such a number could be a private branch exchange or an E.164 telephone number dialled through a specific ...
Session Initiation Protocol: RFC 3261 SHA hash functions: RFC 3174, RFC 4634 Simple Authentication and Security Layer: RFC 2222, RFC 4422 Simple Mail Transfer Protocol, Internet Message Format: RFC 196, RFC 772, RFC 821, RFC 822, RFC 2821, RFC 2822, RFC 5321, RFC 5322 Simple Network Management Protocol: RFC 1067, RFC 1098, RFC 1157 (v.1), RFC ...
JsSIP implements the following SIP specifications: RFC 3261 — SIP: Session Initiation Protocol; RFC 3311 — SIP Update Method; RFC 3326 — The Reason Header Field for SIP; RFC 3327 — SIP Extension Header Field for Registering Non-Adjacent Contacts (Path header) RFC 3428 — SIP Extension for Instant Messaging (MESSAGE method)
A B2BUA maintains complete state for the calls it handles. Each side of a B2BUA operates as a standard SIP user agent network element as specified in RFC 3261. In addition to call management, a B2BUA may provide billing services, internetworking for protocol conversions, and hiding of network-internal topology and information.
The Session Initiation Protocol (SIP) is the signaling protocol selected by the 3rd Generation Partnership Project (3GPP) [1] [2] to create and control multimedia sessions with multiple participants in the IP Multimedia Subsystem (IMS). It is therefore a key element in the IMS framework.
The query returns a result set of NAPTR records, as per RFC 3403. In the example above, the response is an address that can be reached in the Internet using the VoIP protocol SIP per RFC 3261. The terminal application now sets up a communication link, and the call is routed via the Internet.