{"id":2692,"date":"2010-11-08T21:27:23","date_gmt":"2010-11-08T21:27:23","guid":{"rendered":"https:\/\/www.commetrex.com\/?p=2692"},"modified":"2010-11-08T21:27:23","modified_gmt":"2010-11-08T21:27:23","slug":"smart-foip-gateways-2","status":"publish","type":"post","link":"https:\/\/commetrex.com\/?p=2692","title":{"rendered":"Smart FoIP in Gateways"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-2620\" title=\"Smart FoIP\" src=\"http:\/\/commetrex.com\/wp-content\/uploads\/2011\/11\/smartfoip_bulb-194x300.png\" alt=\"Smart FoIP\" width=\"194\" height=\"300\" \/>The wide-scale deployment of V.34 fax terminals is making the design of FoIP-capable IP-PSTN gateways much more of a challenge since V.34 terminals employ a completely different start-up sequence than non-V.34 machines. Moreover, since gateways typically begin calls in G.711 pass-through mode (rather than T.38), V.34-capable endpoints can actually \u201chear each other\u201d well in advance of the resolution of the SIP signaling resolving the session\u2019s setup. This means the gateways must take an \u201cactivist\u201d role to ensure that <a title=\"T.38 Fax Relay Software\" href=\"http:\/\/commetrex.com\/products\/fax-portal-2\/t-38-fax-relay-software\/\">T.38<\/a> is \u201cgiven a chance\u201d prior to the endpoints going on their merry way, leaving the gateways behind.<!--more--><\/p>\n<p>Because this technology isn\u2019t widely understood, it\u2019s probably safe to say that there are no T.38 V3 gateways with V.34 support that can actually establish a T.38-based V.34 session outside the lab.<\/p>\n<p>If you\u2019re a gateway developer, you probably know that a called <a title=\"V.34 Fax Modem\" href=\"http:\/\/commetrex.com\/products\/v-34-fax-modem\/\">V.34<\/a> terminal has a completely different answer tone than a V.17 terminal, and, to make matters worse, it\u2019s the same tone as a V.34\/V.90 data modem.And if the calling terminal hears that tone and its response reaches the called terminal prior to T.38 being established, it\u2019s too late for the two gateways to do anything about it. The endpoint machines are off to the races in G.711 mode. If the SIP peers then attempt to switch to T.38, the session will fail. The only hope, then, is for the session to continue in G.711 pass-through mode, where it at least has a fighting chance.<\/p>\n<p>Commetrex\u2019 &#8220;<a title=\"Smart FoIP\" href=\"http:\/\/commetrex.com\/products\/smart-foip\/\">Smart FoIP<\/a>&#8221; gives it much more than a fighting chance. With Smart FoIP\u2019s patent-pending technology, even G.711 sessions are reliable. (Yes, you read that correctly.)<\/p>\n<p>So, gateway developers, you need not despair, because Commetrex\u2019 Smart FoIP is here. Smart FoIP handles the four fax-session configurations you need to be concerned about:<\/p>\n<ul>\n<li>Called GW, V34 fax supported<\/li>\n<li>Called GW, V34 fax not supported<\/li>\n<li>Calling GW, V34 fax supported<\/li>\n<li>Calling GW, V34 fax not supported<\/li>\n<\/ul>\n<p>And Smart FoIP encapsulates the media technologies you need to do it: V.8 modems, ANSam generation-detection, and call classification\u2026all in one handy module.<\/p>\n<p>There\u2019s only one company with the mantra: \u201c<strong>We make FoIP work!<\/strong>\u201d<\/p>\n<p>So, if you intend to do anything about moving to V.34 fax support in your gateway, there\u2019s only one place to go if you want it to actually work.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The wide-scale deployment of V.34 fax terminals is making the design of FoIP-capable IP-PSTN gateways much more of a challenge&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,9,17,8,15],"tags":[],"class_list":["post-2692","post","type-post","status-publish","format-standard","hentry","category-blog","category-g-711","category-smart-foip","category-t-38","category-v-34"],"_links":{"self":[{"href":"https:\/\/commetrex.com\/index.php?rest_route=\/wp\/v2\/posts\/2692","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/commetrex.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/commetrex.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/commetrex.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/commetrex.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2692"}],"version-history":[{"count":0,"href":"https:\/\/commetrex.com\/index.php?rest_route=\/wp\/v2\/posts\/2692\/revisions"}],"wp:attachment":[{"href":"https:\/\/commetrex.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2692"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/commetrex.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2692"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/commetrex.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2692"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}