{"id":551,"date":"2010-03-04T20:47:37","date_gmt":"2010-03-04T19:47:37","guid":{"rendered":"http:\/\/ccievoice.ksiazek.be\/?p=551"},"modified":"2025-01-11T18:28:04","modified_gmt":"2025-01-11T17:28:04","slug":"h225-ras-messages","status":"publish","type":"post","link":"https:\/\/collaboration.ksiazek.be\/?p=551","title":{"rendered":"H225 RAS Messages"},"content":{"rendered":"<p>Here are the different messages used by the H225 RAS signaling which can occur between endpoints and GK.<\/p>\n<blockquote>\n<ul>\n<li><strong><span style=\"color: #ff0000;\">Gatekeeper Discovery<\/span><\/strong> : used by endpoints to register<\/li>\n<p><\/p>\n<blockquote>\n<ul>\n<li>GRQ : Gatekeeper Request<\/li>\n<li>GCF : Gatekeeper Confirm<\/li>\n<li>GRJ: Gatekeeper Reject<\/li>\n<\/ul>\n<\/blockquote>\n<li><strong><span style=\"color: #ff0000;\">Registration\/Unregistration<\/span><\/strong> : used by endpoints to register or unregister their address and their zone withtin the GK.<\/li>\n<p><\/p>\n<blockquote>\n<ul>\n<li>RRQ : Registration Request<\/li>\n<li>RCF : Registration Confirm<\/li>\n<li>RRJ : Registration Reject<\/li>\n<\/ul>\n<\/blockquote>\n<p><\/p>\n<blockquote>\n<ul>\n<li>URQ : Unregistration Request<\/li>\n<li>UCF : Unregistration Confirm<\/li>\n<li>URJ : Unregistration Reject<\/li>\n<\/ul>\n<\/blockquote>\n<li><span style=\"color: #ff0000;\"><strong>Admission Control <\/strong><\/span>: These messages are used for all admission control and bandwidth management<\/li>\n<p><\/p>\n<blockquote>\n<ul>\n<li>ARQ : Admission Request<\/li>\n<li>ACF : Admission Confirm<\/li>\n<li>ARJ : Admission Reject<\/li>\n<\/ul>\n<\/blockquote>\n<li><span style=\"color: #ff0000;\"><strong>Bandwidth Control<\/strong><\/span> : these messages are used if you want to change the amount of bandwidth during a call<\/li>\n<p><\/p>\n<blockquote>\n<ul>\n<li>BRQ : Bandwidth Request<\/li>\n<li>BCF : Bandwidth Confirm<\/li>\n<li>BRJ : Bandwidth Reject<\/li>\n<\/ul>\n<\/blockquote>\n<li><span style=\"color: #ff0000;\"><strong>Endpoint Location <\/strong><\/span>: These messages are used to retrieve contact information ( also with Directory GK)<\/li>\n<p><\/p>\n<blockquote>\n<ul>\n<li>LRQ : Location Request<\/li>\n<li>LCF : Location Confirm<\/li>\n<li>LRJ : Location Reject<\/li>\n<\/ul>\n<\/blockquote>\n<li><span style=\"color: #ff0000;\"><strong>Status Information<\/strong><\/span> : They are used to retrieve a status information<\/li>\n<p><\/p>\n<blockquote>\n<ul>\n<li>IRQ : Information Request<\/li>\n<li>IRR : Information Response Request<\/li>\n<\/ul>\n<\/blockquote>\n<\/ul>\n<\/blockquote>\n<p>H225 call control signaling is on <strong><span style=\"color: #ffff00;\">TCP\/1720<\/span><\/strong> and uses Q931 messages to establish, maintain and tear down calls. these messages are<\/p>\n<blockquote>\n<ul>\n<li>Setup<\/li>\n<li>Setup Acknowledge<\/li>\n<li>Call Proceeding<\/li>\n<li>Progress Alerting<\/li>\n<li>Connect<\/li>\n<li>User Information<\/li>\n<li>Release Complete<\/li>\n<li>Status Inquiry<\/li>\n<li>Status<\/li>\n<li>Information<\/li>\n<li>Notify<\/li>\n<\/ul>\n<\/blockquote>\n<p>So in general , here is the following reminder: While h225 call control signaling can be used for call setup, H245 must be used to determine a master\/slave relationship, exchange terminal capabilities, logical channel signaling and DTMF relay.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Here are the different messages used by the H225 RAS signaling which can occur between endpoints and GK. Gatekeeper Discovery : used by endpoints to register GRQ : Gatekeeper Request GCF : Gatekeeper Confirm GRJ: Gatekeeper Reject Registration\/Unregistration : used by endpoints to register or unregister their address and their zone withtin the GK. RRQ [&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":[28,30,62,1,33],"tags":[59,65,29,183,184,185],"class_list":["post-551","post","type-post","status-publish","format-standard","hentry","category-h323","category-ios","category-lab","category-non-classe","category-written-theory","tag-ccie-voice-written","tag-gatekeeper","tag-h323","tag-h225","tag-h245","tag-ras"],"_links":{"self":[{"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=\/wp\/v2\/posts\/551","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=551"}],"version-history":[{"count":1,"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=\/wp\/v2\/posts\/551\/revisions"}],"predecessor-version":[{"id":4424,"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=\/wp\/v2\/posts\/551\/revisions\/4424"}],"wp:attachment":[{"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=551"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=551"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/collaboration.ksiazek.be\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}