| dbo:abstract
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- SIP-Status-Codes, ungenau auch SIP-Fehler-Codes oder englisch SIP-Responses genannt, bezeichnen die möglichen Antworten auf eine SIP-Anfrage. Das Session Initiation Protocol (SIP) für Aufbau, Steuerung und Abbau einer Kommunikationssitzung (zumeist IP-Telefonie) ist an das Hypertext Transfer Protocol angelehnt. Die Teilnehmergeräte senden sich Anfragen (englisch requests) und beantworten diese mittels Antwort-Codes (englisch responses), die auf den HTTP-Statuscodes aufbauen. (de)
- The Session Initiation Protocol (SIP) is a signalling protocol used for controlling communication sessions such as Voice over IP telephone calls. SIP is based on request/response transactions, in a similar manner to the Hypertext Transfer Protocol (HTTP). Each transaction consists of a SIP request (which will be one of several request methods), and at least one response. SIP requests and responses may be generated by any SIP user agent; user agents are divided into clients (UACs), which initiate requests, and servers (UASes), which respond to them. A single user agent may act as both UAC and UAS for different transactions: for example, a SIP phone is a user agent that will be a UAC when making a call, and a UAS when receiving one. Additionally, some devices will act as both UAC and UAS for a single transaction; these are called Back-to-Back User Agents (B2BUAs). SIP responses specify a three-digit integer response code, which is one of a number of defined codes that detail the status of the request. These codes are grouped according to their first digit as "provisional", "success", "redirection", "client error", "server error" or "global failure" codes, corresponding to a first digit of 1–6; these are expressed as, for example, "1xx" for provisional responses with a code of 100–199. The SIP response codes are consistent with the HTTP response codes, although not all HTTP response codes are valid in SIP. SIP responses also specify a "reason phrase", and a default reason phrase is defined with each response code. These reason phrases can be varied, however, such as to provide additional information or to provide the text in a different language. The SIP response codes and corresponding reason phrases were initially defined in RFC 3261. That RFC also defines a SIP Parameters Internet Assigned Numbers Authority (IANA) registry to allow other RFC to provide more response codes. This list includes all the SIP response codes defined in IETF RFCs and registered in the SIP Parameters IANA registry as of 14 July 2017. This list also includes SIP response codes defined in obsolete SIP RFCs (specifically, RFC 2543), which are therefore not registered with the IANA; these are explicitly noted as such. (en)
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| rdfs:comment
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- SIP-Status-Codes, ungenau auch SIP-Fehler-Codes oder englisch SIP-Responses genannt, bezeichnen die möglichen Antworten auf eine SIP-Anfrage. Das Session Initiation Protocol (SIP) für Aufbau, Steuerung und Abbau einer Kommunikationssitzung (zumeist IP-Telefonie) ist an das Hypertext Transfer Protocol angelehnt. Die Teilnehmergeräte senden sich Anfragen (englisch requests) und beantworten diese mittels Antwort-Codes (englisch responses), die auf den HTTP-Statuscodes aufbauen. (de)
- The Session Initiation Protocol (SIP) is a signalling protocol used for controlling communication sessions such as Voice over IP telephone calls. SIP is based on request/response transactions, in a similar manner to the Hypertext Transfer Protocol (HTTP). Each transaction consists of a SIP request (which will be one of several request methods), and at least one response. (en)
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