{"id":2110,"date":"2012-04-18T19:49:31","date_gmt":"2012-04-18T19:49:31","guid":{"rendered":"http:\/\/192.168.16.235\/?page_id=2110"},"modified":"2020-01-17T12:28:17","modified_gmt":"2020-01-17T12:28:17","slug":"open-telecommunications-framework-a-new-architecture-for-fax-telephony","status":"publish","type":"page","link":"https:\/\/commetrex.com\/?page_id=2110","title":{"rendered":"Open Telecommunications Framework: A New Architecture for Fax Telephony"},"content":{"rendered":"<p>[vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;grid&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; el_class=&#8221;white_paper_inner_page&#8221; z_index=&#8221;&#8221;][vc_column][vc_column_text]Commetrex has developed an architecture for high-density telephony that smoothes the transition from TDM to IP transports for applications such as IVR, unified messaging, audio conferencing, and especially fax. Commetrex\u2019 Open Telecommunications Framework (OTF) takes advantage of the MSP Media Gateway PCI cards configured as \u201cfax boards\u201d to offer analog and digital interfaces to the PSTN. But it goes further by leveraging the economies made possible by blade servers combined with the OTF Kernel telephony middleware to extend the OEM\u2019s coverage to IP networks on the same system platform. This architecture gives the telephony system developer unprecedented options in networks and media that support new high-value applications such as IP-based fax servers.<\/p>\n<p>&nbsp;<\/p>\n<p>The enterprise and carrier-equipment vendors must be able to cost-effectively develop applications where the underlying platform renders the network\u2014IP or PSTN\u2014or the transport\u2014G.711 pass-through, T.38 fax relay, or traditional fax modems\u2014transparent to the application. Developers of enterprise systems must be able to take advantage of the power of today\u2019s host processors, which double in power every 18 months while the MIPS required to process a fax media stream have remained relatively constant, and, in the case of T.38, have actually gone down. In today\u2019s market, business as usual with traditional \u201cfax boards\u201d just doesn\u2019t fill the bill.<\/p>\n<p>&nbsp;<\/p>\n<p>But why is Commetrex the company to come forward with a new architecture for the industry? It\u2019s the natural result of Commetrex\u2019 position as a leading developer and licensor of fax technologies and framework software, and the Company\u2019s unmatched record of innovation in fax and related technologies.<\/p>\n<ul>\n<li>In 1994 Commetrex shipped MultiFax, the industry\u2019s first fax software-add-in product. It turned the NMS voice boards into voice-fax boards, and later became the basis of NMS\u2019s NaturalFax. Today, AudioCodes, BICOM, NMS, and Pika, in addition to countless telecom equipment manufacturers (TEMs), base their fax products on Commetrex technology.<\/li>\n<li>In 1997 Commetrex founded the <a title=\"MSP Consortium\" href=\"http:\/\/www.msp.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">MSP Consortium<\/a>\u00a0to bring the benefits of open architectures to the media-technology level of digital-media telephony. In 1998 the M.100 Media Streams Processing environment specification was published; Commetrex shipped OpenMedia, its M.100 implementation, in 2000.<\/li>\n<li>In 2000 Commetrex shipped <a title=\"T.38 Fax Relay\" href=\"http:\/\/commetrex.com\/customers\/customers-by-name\/t-38-fax-relay\/\">T.38 Fax Relay Software and I.366.2<\/a> as licensed technology.<\/li>\n<li>In 2001 shipped <a title=\"Terminating T.38\" href=\"http:\/\/commetrex.com\/customers\/customers-by-name\/terminating-t-38\/\">TerminatingT38<\/a>, the industry\u2019s first and only product to support sending and receiving T.38 real-time IP fax transactions, just as multi-line \u201cfax boards\u201d send and receive PSTN faxes.<\/li>\n<li>In 2002 opened the hugely successful T.38 Interoperability Lab, significantly improving the interoperability of T.38 products from a dozen TEMs.<\/li>\n<li>In 2003 shipped <a title=\"Multi-Modal Terminating Fax (MMTF)\" href=\"http:\/\/commetrex.com\/products\/multi-modal-terminating-fax-mmtf\/\">Multi-Modal Terminating Fax (MMTF)<\/a>, which allows media servers to send and receive IP faxes whether they are sent through T.38-capable gateways or those that only support G.711 pass-through fax.<\/li>\n<li>In 2004 shipped <a title=\"BladeWare HMP Media Server\" href=\"http:\/\/commetrex.com\/products\/bladeware-hmp-media-server\/\"><em>BladeWare<\/em><\/a>, the industry\u2019s only SIP-based host-media-processing framework for telecom equipment manufacturers.<\/li>\n<li>In 2004 shipped the MSP series MSP-H8 of open-architecture PCI telephony boards.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Now, Commetrex is rolling up this portfolio of innovative technologies and products into a new architecture, Open Telecommunications Framework (OTF), which allows the industry\u2019s OEMs and system developers to support, easily and cost-effectively, both PSTN and IP voice and fax applications on the same platform.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2111\" title=\"otfwp1\" src=\"http:\/\/commetrex.com\/wp-content\/uploads\/2012\/04\/otfwp1.jpg\" alt=\"OTF Architecture\" width=\"468\" height=\"369\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>The OTF architecture Open Telecommunications Framework\u00ae Portal, shown in Figure 1, is comprised of <a title=\"OTF Kernel\" href=\"http:\/\/commetrex.com\/products\/otf-kernel\/\">OTF Kernel<\/a>, which includes client APIs to access system, call, and media services, and the system services, such as authentication, media storage, and call routing. Call control commands are passed on to resource service managers; media services are passed on to media resource controllers. As OTF Kernel is completely open, OEMs can replace or extend any of these services.<\/p>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;grid&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; el_class=&#8221;white_paper_inner_page&#8221; css=&#8221;.vc_custom_1578991890670{padding-top: 70px !important;padding-bottom: 70px !important;}&#8221; z_index=&#8221;&#8221;][vc_column el_class=&#8221;white_paper_inner_page_bg&#8221;][vc_column_text]<\/p>\n<h3>Dual-Network Support<\/h3>\n<p>&nbsp;<\/p>\n<p>Within OTF, the critical components for the fax system developer are Multi-Modal Terminating Fax and the MSP series of PSTN network-interface boards. MMTF is Commetrex\u2019 unique host-based product that terminates hundreds of simultaneous IP faxes on one server blade. The MSP boards extend the system\u2019s reach into the PSTN.<\/p>\n<p>&nbsp;<\/p>\n<p>This architecture is shown in Figure 2, which depicts the major elements of a system that supports the termination (send and receive) of PSTN faxes and IP-based G.711 pass- through and T.38 faxes.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2112\" title=\"otfwp2\" src=\"http:\/\/commetrex.com\/wp-content\/uploads\/2012\/04\/otfwp2.jpg\" alt=\"Transport-Independent Fax\" width=\"327\" height=\"311\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>The figure is simplified by not showing the MSP PSTN-interface boards required to interface with the PSTN. For the MSP-H8, call control means hook control and in-band call-progress analysis. The analog modems are implemented on the host for both the MSP-H8 and\u00a0<em>BladeWare<\/em>. The same modems are used for each, but in the case of IP connections, the PCM streams are packaged into RTP packets while they are sent directly to the analog MSP-H8 for PSTN calls. All of this is transparent to the application.<\/p>\n<p>&nbsp;<\/p>\n<p>For IP-based calls, call control is managed by an IP call-control facility, such as SIP, H.323, or H.248, labeled \u201cIP Call Control\u201d in the diagram. (SIP is currently supported in\u00a0<em>BladeWare<\/em>.) In all cases, the same T.30 protocol engine is used (\u201cFax Service Manager\u201d) to control the fax session. For those gateways that support T.38, the call stream is routed through the T.38 protocol engine. Gateways that do not support T.38 resort to what is known as \u201cG.711 pass-through\u201d. In G.711 pass-through the analog stream is packetized into an RTP stream, so it must be modulated\/demodulated by analog modems. (This means 10 times as much IP bandwidth as T.38 and no spoofing, so the faxes are error-prone due to lost packets and mismatches between PCM clocks.) Therefore, a dual-transport-capable OTF system can send-receive faxes from any PSTN-connected G3 fax terminal or any gateway via IP.<\/p>\n<p>&nbsp;<\/p>\n<p>When configured as an IP-based software-only system, the platform is called\u00a0<em>BladeWare<\/em>.\u00a0<em>BladeWare<\/em>\u00a0Fax Media Server (FMS) adds the SIP-based Media Server Command Mark-up Language application\u00a0<a title=\"BladeWare Fax Media Server\" href=\"http:\/\/commetrex.com\/products\/bladeware-fax-media-server\/\"><em>BladeWare<\/em>\u00a0Fax Media Server<\/a>. Of course, if IP-network functionality is not required, the MSP line of network-interface boards can be configured as traditional \u201cfax boards\u201d, both analog and digital.[\/vc_column_text][\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;grid&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; el_class=&#8221;white_paper_inner_page&#8221; css=&#8221;.vc_custom_1578991890670{padding-top: 70px !important;padding-bottom: 70px !important;}&#8221; z_index=&#8221;&#8221;][vc_column el_class=&#8221;white_paper_inner_page_bg&#8221;][vc_column_text]<\/p>\n<h3>Enterprise Fax<\/h3>\n<p>&nbsp;<\/p>\n<p>The diagram below (Figure 3) depicts an application of OTF in a multi-location enterprise that integrates all locations through an IP network. The MSP-H8 analog interface serves as an end-point media gateway in two of the offices. The other offices are handled by pre-existing equipment: one an IAD without T.38 capability, the other an access router with T.38. The requirement is to seamlessly handle faxes from all offices, which are interconnected via the enterprise IP network, the Internet, or VPN. Client workstations in all offices access the corporate fax server via their LAN without requiring any hardware resources.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2113\" title=\"otfwp3\" src=\"http:\/\/commetrex.com\/wp-content\/uploads\/2012\/04\/otfwp3.jpg\" alt=\"OTF Architecture\" width=\"579\" height=\"404\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>The office with the IAD is a home office, which uses the IAD supplied by the employee\u2019s DSL provider.<\/p>\n<p>&nbsp;<\/p>\n<p>The two offices equipped with an MSP-H8 have a mix of FXS and FXO interfaces to support both voice and fax stations, as well as PSTN connectivity. Since the MSP-H8 supports both interfaces, and OTF Kernel supports both PSTN and IP routing, the remote office can hairpin-turn faxes to the PSTN or route them to another office via the Internet using T.38 fax relay. The correspondent office can then terminate the fax or route it via T.38 to another office or out to the local PSTN. This can result in significant toll savings, especially if the offices are in different countries.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-full wp-image-2114\" title=\"otfwp4\" src=\"http:\/\/commetrex.com\/wp-content\/uploads\/2012\/04\/otfwp4.jpg\" alt=\"Fax Board\" width=\"280\" height=\"132\" \/>To accomplish this, the application determines the cost of the available routes for a fax to reach its destination. It then executes OTF Kernel commands that will cause the fax to be routed either directly to the PSTN or to the MSP-based gateway in another enterprise location. This is possible because the OTF system has the media technologies needed to support PSTN fax with multi-line fax modems (the MSP Media Gateways serving as fax boards), T.38 IP real-time faxes, and G.711 pass-through faxes.<\/p>\n<p>&nbsp;<\/p>\n<p>OTF makes the multiple transports transparent to the application. It isolates the application from any specific signaling system by the OTF System Call Router (SCR) API, which exposes generic call-control functions such as \u201cplace call\u201d to the application. The system takes care of the routing using routing rules, which are maintained independently of the application.[\/vc_column_text][\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;grid&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; el_class=&#8221;white_paper_inner_page&#8221; css=&#8221;.vc_custom_1578991890670{padding-top: 70px !important;padding-bottom: 70px !important;}&#8221; z_index=&#8221;&#8221;][vc_column el_class=&#8221;white_paper_inner_page_bg&#8221;][vc_column_text]<\/p>\n<h3>Fax Boards<\/h3>\n<p>&nbsp;<\/p>\n<p>But if all you need is a traditional \u201cfax board\u201d, Commetrex\u2019 MSP Media Gateway boards are configured for fax support, and for voice if required. This means Commetrex\u2019 fax modems and T.30 protocol engine, each with 10 years of field experience, are applied to your application. Your customers benefit from this experience by unrivaled interoperability.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-full wp-image-2115\" title=\"otfwp5\" src=\"http:\/\/commetrex.com\/wp-content\/uploads\/2012\/04\/otfwp5.jpg\" alt=\"Fax Boards\" width=\"323\" height=\"141\" \/>Both of these boards are sold without software. Then, you only need to license the number of ports required by your application. In the case of the MSP-H8, each port also requires a field-pluggable trunk interface as well as an incremental software runtime license. The board, as shown above, supports one-to-8 lines. The MSP-320 configured with its Quad E1\/T1 Daughterboard, supports one-to-120 fax ports over four T or E spans.[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;grid&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; el_class=&#8221;white_paper_inner_page&#8221; z_index=&#8221;&#8221;][vc_column][vc_column_text]Commetrex has developed an architecture for high-density telephony that smoothes the&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1259,"menu_order":6,"comment_status":"open","ping_status":"open","template":"full_width.php","meta":{"footnotes":""},"class_list":["post-2110","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/commetrex.com\/index.php?rest_route=\/wp\/v2\/pages\/2110","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/commetrex.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/commetrex.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"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=2110"}],"version-history":[{"count":2,"href":"https:\/\/commetrex.com\/index.php?rest_route=\/wp\/v2\/pages\/2110\/revisions"}],"predecessor-version":[{"id":5624,"href":"https:\/\/commetrex.com\/index.php?rest_route=\/wp\/v2\/pages\/2110\/revisions\/5624"}],"up":[{"embeddable":true,"href":"https:\/\/commetrex.com\/index.php?rest_route=\/wp\/v2\/pages\/1259"}],"wp:attachment":[{"href":"https:\/\/commetrex.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2110"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}