{"id":10035,"date":"2013-05-01T15:11:52","date_gmt":"2013-05-01T20:11:52","guid":{"rendered":"http:\/\/bucktownbell.com\/?p=10035"},"modified":"2013-05-01T15:24:32","modified_gmt":"2013-05-01T20:24:32","slug":"bt-unleashes-sip-licensing-troll-army","status":"publish","type":"post","link":"http:\/\/bucktownbell.com\/?p=10035","title":{"rendered":"BT unleashes SIP licensing troll army"},"content":{"rendered":"<blockquote><p>VoIP-to-PSTN termination providers and SIP vendors will be watching their inboxes for a lawyer&#8217;s letter from BT, which has kicked off a <span style=\"text-decoration: line-through;\">taxing<\/span> licensing program levying a fee on the industry, based on a list of 99 patents.<\/p><\/blockquote>\n<p>via <a href=\"http:\/\/www.theregister.co.uk\/2013\/04\/30\/bt_trolling_sip_in_battle_with_google\/\">BT unleashes SIP licensing troll army \u2022 The Register<\/a>.<\/p>\n<p>A useful comment from <a href=\"http:\/\/yro.slashdot.org\/story\/13\/05\/01\/1353231\/british-telecom-claims-patents-on-voip-session-initiation-protocol\">slashdot<\/a>.<\/p>\n<blockquote><p>The IETF MMUSIC (Multiparty Multimedia Session Control) Working Group <a title=\"ietf.org\" href=\"http:\/\/www.ietf.org\/proceedings\/29\/charters\/mmusic-charter.html\">started working on Session Protocols<\/a> [ietf.org] in 1993.<\/p>\n<p>Initial Internet drafts for a Session Invitation Protocol and a Simple Conference Invitation Protocol were prepared in 1996, and merged to a single first draft of SIP by December 1996 (<a title=\"columbia.edu\" href=\"http:\/\/www.cs.columbia.edu\/sip\/talks\/sip-short-history.pdf\">slide 10<\/a> [columbia.edu]), with further drafts (2-12) leading up to the publication of RFC 2543 in March of 1999 (slides 11-13, ibid.).<\/p>\n<p>I don&#8217;t see anything that says BT had a hand in anything to do with SIP up to 1996. More than half the patents BT claims (<a title=\"btplc.com\" href=\"http:\/\/www.btplc.com\/Innovation\/Licensing\/Patentlicensingprogrammes\/SIPTrunking\/Formlicenceagreement.htm\">Exhibit C<\/a> [btplc.com]) were filed after RFC 2543 was published.<\/p>\n<p>I hope this information is a useful starting point for some SIP vendor.<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>VoIP-to-PSTN termination providers and SIP vendors will be watching their inboxes for a lawyer&#8217;s letter from BT, which has kicked off a taxing licensing program levying a fee on the industry, based on a list of 99 patents. via BT &hellip; <a href=\"http:\/\/bucktownbell.com\/?p=10035\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[133,301,727,330],"class_list":["post-10035","post","type-post","status-publish","format-standard","hentry","category-voip","tag-itsp","tag-patent-trolls","tag-rent-seeking","tag-sip"],"_links":{"self":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/10035","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10035"}],"version-history":[{"count":3,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/10035\/revisions"}],"predecessor-version":[{"id":10039,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/10035\/revisions\/10039"}],"wp:attachment":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10035"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10035"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10035"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}