{"id":257,"date":"2009-10-27T19:51:10","date_gmt":"2009-10-27T18:51:10","guid":{"rendered":"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/?p=257"},"modified":"2010-01-27T11:53:45","modified_gmt":"2010-01-27T10:53:45","slug":"trunking-calls-between-asterisk-servers-with-iax2","status":"publish","type":"post","link":"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/2009\/10\/27\/trunking-calls-between-asterisk-servers-with-iax2\/","title":{"rendered":"Trunking calls between Asterisk servers with IAX2."},"content":{"rendered":"<div id=\"attachment_258\" style=\"width: 310px\" class=\"wp-caption alignright\"><a href=\"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/wp-content\/uploads\/2009\/10\/Trevor_at_bitspc.jpg\"><img aria-describedby=\"caption-attachment-258\" decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-258\" title=\"Trevor testing a pair of Asterisk servers\" src=\"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/wp-content\/uploads\/2009\/10\/Trevor_at_bitspc-300x206.jpg\" alt=\"Trevor testing a pair of Asterisk servers\" width=\"300\" height=\"206\" srcset=\"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/era-data\/uploads\/2009\/10\/Trevor_at_bitspc-300x206.jpg 300w, http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/era-data\/uploads\/2009\/10\/Trevor_at_bitspc.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-258\" class=\"wp-caption-text\">Trevor testing a pair of Asterisk servers<\/p><\/div>\n<p>At the end of last week we managed to create an <a title=\"IAX and Asterisk\" href=\"http:\/\/www.voip-info.org\/wiki\/view\/IAX\" target=\"_blank\">IAX<\/a> to <a title=\"Trunking two asterisk servers with iax\" href=\"http:\/\/www.voip-info.org\/wiki\/view\/Asterisk+-+dual+servers\" target=\"_blank\">IAX trunk between 2 asterisk servers<\/a> on the local wired LAN. IAX trunking is a way to connect multiple Asterisk servers and allow clients of different servers to place calls to each other.<!--more-->There are two Asterisk configuration files that need changing to make this possible &#8211; the definitions of other iax servers to communicate with in \/etc\/asterisk\/iax.conf and amending the dialplan to direct calls to clients of remote asterisk servers in \/etc.asterisk\/extensions.conf. In our case, we defined two Asterisk servers &#8211; <strong>beach<\/strong> and <strong>base<\/strong>, and commanded each of them to contact the other by IP address and set up a trunk using the default iax2 <a title=\"Port 4569 is for iax2\" href=\"http:\/\/www.pc-library.com\/ports\/tcp-udp-port\/4569\/\" target=\"_blank\">port\u00a0 4569 <\/a>&#8211; all this happens in iax.conf . In the dialplan file extensions.conf , we re-arranged the phone extension numbers for users <strong>era1<\/strong> to <strong>era8<\/strong> so that they would register with the <strong>beach<\/strong> Asterisk server along with the MeetMe conference location 1234. Phone extensions <strong>era8<\/strong> and <strong>era9<\/strong> were both defined as registered with Asterisk server <strong>base<\/strong>. In the <strong>beach<\/strong> dialplan, calls to extensions registered at the <strong>base<\/strong> Asterisk server were told to route through server <strong>base<\/strong> using iax2, and vice versa.\u00a0 Calls placed by a <strong>beach<\/strong> user to another <strong>beach<\/strong> user were connected using SIP as before.<br \/>\nThis is a little complex to describe, but perhaps following the output of the <strong>base<\/strong> server in <a title=\"Output of server 'base' during iax testing\" href=\"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/wp-content\/uploads\/2009\/10\/asterisk_iax_test.png\" target=\"_blank\">this graphic<\/a> will help:<br \/>\nAt the top line there&#8217;s a call being made between a SIP client of <strong>base<\/strong> and <strong>era2<\/strong> (phone number 2222), which (in line 2 of the output) is accepted by the <strong>beach<\/strong> server which has <strong>era2<\/strong>&#8216;s registration, a common codec is agreed to be Speex in line 3 and the softphone at <strong>era2<\/strong> rings (line 4) and is answered (line 6).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>At the end of last week we managed to create an IAX to IAX trunk between 2 asterisk servers on the local wired LAN. IAX trunking is a way to connect multiple Asterisk servers and allow clients of different servers to place calls to each other.<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21,5],"tags":[32,33,3,29,23,24,30,54,11,31],"_links":{"self":[{"href":"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/wp-json\/wp\/v2\/posts\/257"}],"collection":[{"href":"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/wp-json\/wp\/v2\/comments?post=257"}],"version-history":[{"count":10,"href":"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/wp-json\/wp\/v2\/posts\/257\/revisions"}],"predecessor-version":[{"id":413,"href":"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/wp-json\/wp\/v2\/posts\/257\/revisions\/413"}],"wp:attachment":[{"href":"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/wp-json\/wp\/v2\/media?parent=257"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/wp-json\/wp\/v2\/categories?post=257"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/projects.kmi.open.ac.uk\/era\/vowlan\/wp-json\/wp\/v2\/tags?post=257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}