{"id":540,"date":"2010-03-04T19:59:35","date_gmt":"2010-03-04T18:59:35","guid":{"rendered":"http:\/\/ccievoice.ksiazek.be\/?p=540"},"modified":"2025-01-11T18:28:04","modified_gmt":"2025-01-11T17:28:04","slug":"sip-elements","status":"publish","type":"post","link":"https:\/\/collaboration.ksiazek.be\/?p=540","title":{"rendered":"SIP Elements"},"content":{"rendered":"<p>Here are various elements, definitions of what you can find in SIP world:<\/p>\n<blockquote>\n<ul>\n<li><span style=\"color: #ff0000;\"><strong>User Agent (UA)<\/strong><\/span> : This an endpoint that can act as both an User Agent Client (UAC) and an User Agent Server (UAS), a good example is a SIP IP Phone.<\/li>\n<p><\/p>\n<li><strong><span style=\"color: #ff0000;\">UAC <\/span><\/strong>: This is a logical entity that initiates and sends requests, such as those specifiying the INVITE method. the UAC is a logigal role, so it lasts only for the duration of a SIP transaction.<\/li>\n<p><\/p>\n<li><span style=\"color: #ff0000;\"><strong>UAS<\/strong><\/span> : This is an entity that responds to a SIP request by accepting, rejecting, or redirecting the request. The UAS role also lasts\u00a0 only for the duration of the SIP transaction.<\/li>\n<p><\/p>\n<li><span style=\"color: #ff0000;\"><strong>Redirect Server<\/strong><\/span> : This an (UA) server that provides address translation and redirects clients to alternative destination addresses. It does this by sending 3XX responses to requests.<\/li>\n<p><\/p>\n<li><strong><span style=\"color: #ff0000;\">Proxy Server<\/span><\/strong> : A SIP proxy server&#8217;s primary role is to provide routing, but it can also enforce policies, provide features, and authenticate and authorize users.<\/li>\n<p><\/p>\n<li><span style=\"color: #ff0000;\"><strong>Registrar Server<\/strong><\/span> : Users are registering their current location (location service) so Registrar Server uses the information to provide a lookup service that allows SIP UA to be located.<\/li>\n<p><\/p>\n<li><strong><span style=\"color: #ff0000;\">Location Service <\/span><\/strong>: This is created by a registrar server and is populated with bindings of Address-of-records (AOR). It is a kind of user&#8217;s profiel address. This service can be used by the proxy or redirect servers to retrieve information relating to a called party&#8217;s possible locations.<\/li>\n<\/ul>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Here are various elements, definitions of what you can find in SIP world: User Agent (UA) : This an endpoint that can act as both an User Agent Client (UAC) and an User Agent Server (UAS), a good example is a SIP IP Phone. UAC : This is a logical entity that initiates and sends [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[1,68,33],"tags":[59,175,176,177,69,178,179,180],"class_list":["post-540","post","type-post","status-publish","format-standard","hentry","category-non-classe","category-sip","category-written-theory","tag-ccie-voice-written","tag-proxy-server","tag-redirect-server","tag-registrar-server","tag-sip","tag-ua","tag-uac","tag-uas"],"_links":{"self":[{"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=\/wp\/v2\/posts\/540","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=540"}],"version-history":[{"count":1,"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=\/wp\/v2\/posts\/540\/revisions"}],"predecessor-version":[{"id":4427,"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=\/wp\/v2\/posts\/540\/revisions\/4427"}],"wp:attachment":[{"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=540"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=540"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}