{"id":14047,"date":"2017-06-12T01:14:45","date_gmt":"2017-06-12T00:14:45","guid":{"rendered":"http:\/\/www.ispreview.co.uk\/?p=14047"},"modified":"2017-06-11T09:37:28","modified_gmt":"2017-06-11T08:37:28","slug":"stability-boost-bt-set-fix-g-inp-eci-fibre-broadband-cabinets","status":"publish","type":"post","link":"https:\/\/www.ispreview.co.uk\/index.php\/2017\/06\/stability-boost-bt-set-fix-g-inp-eci-fibre-broadband-cabinets.html","title":{"rendered":"Stability Boost as Openreach Eye G.INP Fix for ECI &#8220;Fibre Broadband&#8221; Cabs"},"content":{"rendered":"<p>Last year <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/openreach\" target=\"_blank\">Openreach<\/a> (<a href=\"https:\/\/www.ispreview.co.uk\/index.php\/go\/britishtelecom\" rel=\"nofollow\" target=\"_blank\">BT<\/a>) was forced to stop a roll-out of Physical Retransmission ReTX (G.INP) technology, which can improve the performance of their <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/fttc\">FTTC<\/a> &#8220;<em>fibre broadband<\/em>&#8221; lines, because of problems with their ECI based Street Cabinets. The good news is that a fix has been found.<!--more--><\/p>\n<p>Just to recap. <strong>G.INP<\/strong> (<em>ITU G.998.4<\/em>) is an error correction technology that is designed to help resolve spikes \/ bursts of <strong>Electromagnetic Interference<\/strong> (impulse noise), which can impact the stability and performance of <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/vdsl\">VDSL2<\/a> lines (<a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/fttc\">FTTC<\/a>). Impulse noise generally comes in two main forms &#8211; intermittent and repetitive.<\/p>\n<p>Noise that occurs as sporadic, unpredictable events are termed <strong>Single High Impulse Noise Events<\/strong> (SHINE) and these often originate from turning an appliance on or off. Meanwhile impulse noise that is consistent is known as <strong>Repetitive Electrical Impulse Noise<\/strong> (REIN), which can be caused by all sorts of things from faulty power adapters to household dimmers etc.<\/p>\n<p>Suffice to say that G.INP can help to iron these problems out, which makes problematic lines more stable and less prone to errors. Improved line stability can also yield a small performance benefit for consumers. Some rival networks (e.g. <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/go\/bskyb\" rel=\"nofollow\" target=\"_blank\">Sky Broadband<\/a>&#8217;s unbundled LLU platform) already support G.INP and in 2015 <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/openreach\" target=\"_blank\">Openreach<\/a> (<a href=\"https:\/\/www.ispreview.co.uk\/index.php\/go\/britishtelecom\" rel=\"nofollow\" target=\"_blank\">BT<\/a>) began a similar roll-out (<a href=\"http:\/\/www.ispreview.co.uk\/index.php\/2015\/01\/bt-enables-physical-retransmission-g-inp-fttc-broadband-lines.html\">here<\/a>) but this didn&#8217;t go quite according to plan (<a href=\"http:\/\/www.ispreview.co.uk\/index.php\/2015\/04\/bt-openreach-briefs-uk-fttc-fibre-broadband-isps-on-g-inp-issues.html\">here<\/a> and <a href=\"http:\/\/www.ispreview.co.uk\/index.php\/2016\/04\/bt-briefly-start-stop-g-inp-roll-eci-fibre-broadband-cabinets.html\">here<\/a>).<\/p>\n<p>As usual the technology worked fine on <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/openreach\" target=\"_blank\">Openreach<\/a>&#8217;s <strong>Huawei<\/strong> based cabinets, although the same could not be said for those lines being served by their footprint of <strong>ECI<\/strong> cabinets and certain VDSL modems. Under certain conditions the ECI lines could suffer a loss of speed, higher latency and a few users also complained of connectivity problems.<\/p>\n<p>Initially Openreach thought they had managed to develop a solution for this, although it soon became clear that there were still problems and the roll-out was ultimately suspended during early 2016.<\/p>\n<h3><strong><span style=\"color: #339966;\">The ECI Fix<\/span><\/strong><\/h3>\n<p>The G.INP upgrade is an important enhancement and so Openreach has continued their efforts with ECI to find a proper solution. Recently ISPs have been told that a new fix has been developed and this is currently going through final testing before being piloted in the wild.<\/p>\n<blockquote class=\"bq1\"><p><strong>A Spokesperson for Openreach told ISPreview.co.uk:<\/strong><\/p>\n<p>&#8220;Openreach have been working very closely with our vendor to find a solution to the issues encountered last year during the rollout of G.INP on our ECI estate.<\/p>\n<p>We have now identified and lab tested a solution that will manage the circumstances where a line was previously becoming unresponsive under a specific set of conditions.&#8221;<\/p><\/blockquote>\n<p>Openreach states that they expect to pilot the solution &#8220;<em>later in the summer<\/em>&#8221; and assuming all goes well then it will be deployed, which could begin as early as <strong>autumn 2017<\/strong>. However there is still a caveat for ECI kit, which has not been overcome.<\/p>\n<p>Retransmission can operate in both downstream and upstream channels simultaneously, although ECI equipment (either modems or DSLAMS) still doesn&#8217;t fully support upstream retransmission. &#8220;<em>Due to a hardware limitation G.INP will only be enabled in the downstream direction which is where we also see most benefit for customers<\/em>,&#8221; said Openreach&#8217;s spokesperson.<\/p>\n<p>Naturally we&#8217;ll be keeping an eye out for the first pilot and looking to see how it impacts line stability and connection latency.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Last year Openreach (BT) was forced to stop a roll-out of Physical Retransmission ReTX (G.INP) technology, which can improve the performance of their FTTC &#8220;fibre broadband&#8221; lines, because of problems with their ECI based Street Cabinets. The good news is that a fix has been found.<\/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":[474,55,69],"class_list":["post-14047","post","type-post","status-publish","format-standard","hentry","category-uk_isp_news","tag-bt","tag-fttc","tag-bt-openreach"],"share_on_mastodon":{"url":"","error":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Stability Boost as Openreach Eye G.INP Fix for ECI &quot;Fibre Broadband&quot; Cabs - ISPreview UK<\/title>\n<meta name=\"description\" content=\"Last year Openreach (BT) was forced to stop a roll-out of Physical Retransmission ReTX (G.INP) technology, which can improve the performance of their FTTC\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ispreview.co.uk\/index.php\/2017\/06\/stability-boost-bt-set-fix-g-inp-eci-fibre-broadband-cabinets.html\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Stability Boost as Openreach Eye G.INP Fix for ECI &quot;Fibre Broadband&quot; Cabs - ISPreview UK\" \/>\n<meta property=\"og:description\" content=\"Last year Openreach (BT) was forced to stop a roll-out of Physical Retransmission ReTX (G.INP) technology, which can improve the performance of their FTTC\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ispreview.co.uk\/index.php\/2017\/06\/stability-boost-bt-set-fix-g-inp-eci-fibre-broadband-cabinets.html\" \/>\n<meta property=\"og:site_name\" content=\"ISPreview UK\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/ispreview\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/ispreview\" \/>\n<meta property=\"article:published_time\" content=\"2017-06-12T00:14:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ispreview.co.uk\/wp-content\/uploads\/2020\/07\/ispreview_uk_logo.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Mark Jackson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@ispreview\" \/>\n<meta name=\"twitter:site\" content=\"@ispreview\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Mark Jackson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"NewsArticle\",\"@id\":\"https:\\\/\\\/www.ispreview.co.uk\\\/index.php\\\/2017\\\/06\\\/stability-boost-bt-set-fix-g-inp-eci-fibre-broadband-cabinets.html#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.ispreview.co.uk\\\/index.php\\\/2017\\\/06\\\/stability-boost-bt-set-fix-g-inp-eci-fibre-broadband-cabinets.html\"},\"author\":{\"name\":\"Mark Jackson\",\"@id\":\"https:\\\/\\\/www.ispreview.co.uk\\\/#\\\/schema\\\/person\\\/de66a8b4e937c21c80e443d1bf9c35d5\"},\"headline\":\"Stability Boost as Openreach Eye G.INP Fix for ECI &#8220;Fibre Broadband&#8221; 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