{"id":7168,"date":"2014-07-09T09:43:26","date_gmt":"2014-07-09T08:43:26","guid":{"rendered":"http:\/\/www.ispreview.co.uk\/?p=7168"},"modified":"2015-10-21T06:54:54","modified_gmt":"2015-10-21T05:54:54","slug":"world-record-alcatel-lucent-push-10gbps-broadband-via-copper-phone-lines","status":"publish","type":"post","link":"https:\/\/www.ispreview.co.uk\/index.php\/2014\/07\/world-record-alcatel-lucent-push-10gbps-broadband-via-copper-phone-lines.html","title":{"rendered":"World Record as Alcatel-Lucent Push 10Gbps Broadband Down Copper Lines"},"content":{"rendered":"<p>Telecom giant <a href=\"http:\/\/www.alcatel-lucent.com\/\" target=\"_blank\"><span style=\"color: #227ab4;\">Alcatel-Lucent<\/span><\/a> appears, perhaps to the dismay of fibre optic campaigners, to have given the traditional copper telephone line a new lease of life after its Bell Labs research division claimed to set a new world record by delivering &#8220;<em>ultra-broadband<\/em>&#8221; speeds of 10,000Mbps (Megabits per second) over the aging infrastructure using a prototype technology called <em>XG-FAST<\/em> (G.fast2?).<\/p>\n<p><!--more--><\/p>\n<p>The prototype <strong>XG-FAST <\/strong>tech, which also demonstrated how existing copper access networks could be used to deliver symmetrical speeds of <strong>1Gbps<\/strong> (Gigabits per second) or 1000Mbps if you prefer, is described as being an &#8220;<em>extension<\/em>&#8221; of <strong><a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/gfast\">G.fast<\/a><\/strong> (aka \u2013 FTTC2 \/ ITU G.9700) technology that can provide Internet connection speeds which are &#8220;<em>indistinguishable<\/em>&#8221; from fibre optic <strong>Fibre-to-the-Home<\/strong> (<a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/ftth\">FTTH<\/a>) services.<\/p>\n<p>Currently <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/go\/britishtelecom\" rel=\"nofollow\" target=\"_blank\">BT<\/a> uses <strong>Fibre-to-the-Cabinet<\/strong> (<a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/fttc\">FTTC<\/a>) technology in the United Kingdom to deliver speeds of <strong>up to 80Mbps<\/strong>, which works by replacing the existing copper cable between street cabinets and your local telephone exchange with a <strong>fibre optic<\/strong> line. The final copper line run from cabinets and into homes is then managed by <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/vdsl\">VDSL2<\/a> technology (similar to <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/adsl\">ADSL<\/a> but faster over short distances).<\/p>\n<p>By comparison <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/gfast\">G.fast<\/a> adopts a similar approach but it\u2019s designed to take even better advantage of the latest advancements (e.g. <strong>Vectoring 2.0<\/strong> to reduce crosstalk interference), which would allow it to operate at speeds of <strong>up to 1Gbps<\/strong>, albeit only by using higher frequencies (106MHz+) and over even shorter runs of copper cable (up to 250 metres). The most likely setup would be to combine <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/gfast\">G.fast<\/a> with <a href=\"http:\/\/www.ispreview.co.uk\/index.php\/2013\/07\/a-look-at-future-fibre-to-the-distribution-point-broadband-isp-tech.html\" target=\"_blank\"><strong>Fibre-to-the-Distribution-Point<\/strong> <\/a>(FTTdp) or FTTrN technology, which takes the fibre optic cable even closer to homes.<\/p>\n<p>However G.fast is still some years away and it&#8217;s likely that <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/go\/britishtelecom\" rel=\"nofollow\" target=\"_blank\">BT<\/a> will be able to squeeze a bit more performance out of <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/fttc\">FTTC<\/a> in the meantime, with <strong>Vectoring<\/strong> potentially allowing for download speeds of <strong>100Mbps+<\/strong>. Other advancements, such as FTTdp and the <strong>30a profile<\/strong> for <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/fttc\">FTTC<\/a>, could potentially deliver speeds of <strong>200Mbps+<\/strong>. But it remains to be seen how <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/go\/britishtelecom\" rel=\"nofollow\" target=\"_blank\">BT<\/a> will shape its future direction and some of these upgrades would be expensive.<\/p>\n<p>In the meantime Alcatel-Lucent has been quietly developing XG-FAST to help keep existing copper telecoms cable in the game, which might make it more economically viable for some operators than the cost of deploying a full fibre optic solution.<\/p>\n<p>XG-FAST goes a lot further than G.fast in the sense that it uses an increased frequency range up to <strong>500MHz<\/strong> in order to achieve higher speeds, but crucially this would be over even <strong>shorter distances<\/strong> (i.e. higher frequencies attenuate more quickly than lower frequencies \/ interference grows over distance, meaning there are diminishing returns in speed as the frequency range increases).<\/p>\n<div align=\"center\"><img decoding=\"async\" class=\"ngg-singlepic ngg-none\" src=\"http:\/\/www.ispreview.co.uk\/wp-content\/gallery\/2014-article-illustrations\/xg-fast_broadband_copper_line_performance_table.gif\" alt=\"xg-fast broadband copper line performance table\" \/><\/div>\n<p>Bell Labs achieved <strong>1Gbps symmetrical<\/strong> over just <strong>70 meters<\/strong> on a single copper pair and <strong>10Gbps<\/strong> was achieved over a distance of <strong>30 meters<\/strong> by using two pairs of lines (bonding). Both tests used standard copper cable provided by a European operator. The speeds are impressive but the distance is clearly more problematic, which might mean more of a choir for operators as they&#8217;d need to bring the accompanying fibre optic cable even closer to your doorstep (at this range you could almost call it FTTB).<\/p>\n<p>Other factors would also become more of a problem when pushing copper lines close to the theoretical limit, such as the thickness of the copper cable itself and this is known to vary.<\/p>\n<blockquote class=\"bq1\"><p><strong>Marcus Weldon, President of Bell Labs, said:<\/strong><\/p>\n<p>&#8220;<em>Our constant aim is to push the limits of what is possible to \u2018invent the future\u2019, with breakthroughs that are 10 times better than are possible today. Our demonstration of 10 Gbps over copper is a prime example: by pushing broadband technology to its limits, operators can determine how they could deliver gigabit services over their existing networks, ensuring the availability of ultra-broadband access as widely and as economically as possible<\/em>.&#8221;<\/p><\/blockquote>\n<blockquote class=\"bq1\"><p><strong>Federico Guill\u00e9n, President of Alcatel-Lucent\u2019s Fixed Networks Business, added:<\/strong><\/p>\n<p>&#8220;<em>The Bell Labs speed record is an amazing achievement, but crucially in addition they have identified a new benchmark for \u2018real-world\u2019 applications for ultra-broadband fixed access. XG-FAST can help operators accelerate <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/ftth\">FTTH<\/a> deployments, taking fiber very close to customers without the major expense and delays associated with entering every home. By making 1 gigabit symmetrical services over copper a real possibility, Bell Labs is offering the telecommunications industry a new way to ensure no customer is left behind when it comes to ultra-broadband access<\/em>.&#8221;<\/p><\/blockquote>\n<p>Alcatel-Lucent&#8217;s achievement is impressive but we won&#8217;t be talking about XG-FAST technology in any kind of practical \/ commercial deployment sense for many years. The first commercial G.fast hardware and deployments isn\u2019t due to begin until 2015 and BT has yet to complete its planned field trial, which means we won&#8217;t even see G.fast commercially in the UK for a few more years (assuming they can overcome its bugs) and before that we&#8217;re likely to see upgrades for FTTC and FTTdp\/RN or similar.<\/p>\n<p>None of these would be cheap upgrades and a move to G.fast\/FTTdp nationally could also take a lot of time. By that time we\u2019ll probably already be seeing symmetric 10Gbps+ from some <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/ftth\">FTTH<\/a>\/P\/B providers. The question for some operators will be whether or not it\u2019s even worth following the G.fast to XG-FAST path, as opposed to simply putting fibre optic cable in the ground and having less to worry about in the future.<\/p>\n<p>NOTE:\u00a0Take Alcatel-Lucent&#8217;s table above with a pinch of salt because <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/vdsl\">VDSL2<\/a> \/ FTTC lines can operator at distances of greater than 400 meters, with well above 1,000 meters being seen in the wild.. albeit naturally at much slower speeds.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Telecom giant Alcatel-Lucent appears, perhaps to the dismay of fibre optic campaigners, to have given the traditional copper telephone line a new lease of life after its Bell Labs research division claimed to set a new world record by delivering &#8220;ultra-broadband&#8221; speeds of 10,000Mbps (Megabits per second) over the aging infrastructure using a prototype technology [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[52,55,65,417,477,482],"class_list":["post-7168","post","type-post","status-publish","format-standard","hentry","category-uk_isp_news","tag-fibre-optic","tag-fttc","tag-ftth","tag-g-fast","tag-science","tag-xg-fast"],"share_on_mastodon":{"url":"","error":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - 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