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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.
Shortly after its debut as a standard in 1999, SIP was adopted by the 3rd Generation Partnership Project (3GPP) as the preferred signaling protocol for the Internet Multimedia Subsystem (IMS).
The URI scheme used for SIP is sip and a typical SIP URI has the form sip:username@domainname or sip:username@hostport, where domainname requires DNS SRV records to locate the servers for SIP domain while hostport can be an IP address or a fully qualified domain name of the host and port.
URI - Uniform Resource Identifier - Use for SIP identity and is similar to an email address. As example, a SIP URI could be sip:johns@xyzcorp.com; Proxy Server - Manages connection requests between UA and other proxy servers. Also provides authentication and authorization.
RFC 3261 SIP: Session Initiation Protocol June 2002 The Contact header field values of the request typically consist of SIP or SIPS URIs that identify particular SIP endpoints (for example, "sip:carol@cube2214a.chicago.com"), but they MAY use any URI scheme.
Resources on a SIP network are identified by a uniform resource identifier (URI), which takes the following generic format: sip:username:password@host:port. If the port is not specified, it defaults to 5060. For secure SIP transmission over TLS, an s may be added to the end of sip to make it sips: sips:username:password@host:port
13 lis 2023 · A SIP-URI communicates who to call via SIP. According to 3CX, "a SIP URI is a user’s SIP phone number. The SIP URI resembles an e-mail address and is written in the syntax below with the following URI parameters: SIP-URI = sip:x@y:Port where x=Username and y=host (domain or IP)."
