{"id":11268,"date":"2016-03-02T08:14:43","date_gmt":"2016-03-02T08:14:43","guid":{"rendered":"http:\/\/www.ispreview.co.uk\/?p=11268"},"modified":"2016-03-02T08:24:20","modified_gmt":"2016-03-02T08:24:20","slug":"itu-gain-consent-for-new-40gbps-fibre-to-the-home-broadband-standard","status":"publish","type":"post","link":"https:\/\/www.ispreview.co.uk\/index.php\/2016\/03\/itu-gain-consent-for-new-40gbps-fibre-to-the-home-broadband-standard.html","title":{"rendered":"ITU Gain Consent for New 40Gbps Ultrafast FTTH Broadband Standard"},"content":{"rendered":"

The International Telecommunication Union<\/a> (ITU) has gained first-stage approval (“consent<\/em>“) for a new set of international Fibre-to-the-Home (FTTH<\/a>\/P) broadband standards, which can support both 40Gbps speeds (NG-PON2) and symmetrical 10Gbps speeds (XGS-PON).<\/p>\n

<\/p>\n

Strictly speaking ISPs can already offer similar performance over their existing ultrafast fibre optic networks and indeed we’ve recently seen Singtel in Singapore promote a 10Gbps<\/strong> (Gigabits per second) service using their 10GPON<\/strong> (Gigabit Passive Optical Network) platform (here<\/a>). Back in 2012 BT<\/a> also demoed 10Gbps using a similar setup (here<\/a>).<\/p>\n

However the new standards go beyond those (see below for details) and it’s always helpful to ensure that everybody is building \/ using kit that is created to the same specification, which ensures good general compatibility. Both of the new standards were developed by the ITU-T Study Group 15<\/a>.<\/p>\n

10 Gigabit Symmetric Passive Optical Network (XGS-PON \/ ITU-T G.9807.1)<\/strong><\/span><\/h3>\n

The previous XG-PON<\/strong> standard only ensured an asymmetric speed of 10Gbps download and 2.5Gbps upload, while a symmetric connection like the new XGS-PON<\/strong> can push 10Gbps in both directions and that’s a very significant improvement.<\/p>\n

The new XGS-PON is said to reuse “existing PON standards to the maximum extent possible<\/em>” and its physical layer follows the XG-PON (ITU-T G.987.2) and 10GE-PON (IEEE 802.3) standards. Meanwhile the design of the XGS-PON protocol layer is based on NG-PON2 (ITU-T G.989.3) and XG-PON (ITU-T G.987.3), and its ONU management and control mechanism is specified in ITU-T G.988.<\/p>\n

XGS-PON also operates on the same optical distribution network (ODN) as XG-PON. The typical distance between the optical line terminal (OLT) and an optical network unit (ONU) is 20 km, and one OLT is capable of supporting up to 128 ONUs.<\/p>\n

“The XGS-PON wavelength plan provides for co-existence with G-PON, XG-PON and NG-PON2. An XGS-PON system is fully backward compatible with XG-PON ONUs, allowing the operation of both XGS-PON and XG-PON ONUs under a single XGS-PON OLT port<\/em>,” said the ITU without twisting its tongue in the process.<\/p>\n

40 Gigabit Passive Optical Network (NG-PON2 \/ ITU-T G.989.2 Amendment 1)<\/strong><\/span><\/h3>\n

The big news today is of course the ITU’s new 40Gbps capable NG-PON2<\/strong> standard, which mixes together ITU-T G.989.1, G.989.2, G.989.3 and is said to be the “first series of standards<\/em>” that will provide download speeds beyond the current 10Gbps.<\/p>\n

The main enhancements with NG-PON2 are provided by its use of multi-wavelength operation and ONU wavelength tunability in both transmitters and receivers (this reuses some of ITU-T G.988 and its wavelength management follows the guideline in ITU-T G.9802).<\/p>\n

ITU Statement on NG-PON2<\/strong><\/p>\n

NG-PON2 is based on a multi-wavelength, point-to-multipoint architecture, and its primary solution is time and wavelength division multiplexed PON (TWDM-PON). A typical TWDM-PON consists of four to eight wavelengths in both directions, achieving a maximum rate of up to 80 Gbit\/s in each direction. Each wavelength is capable of providing a subscriber with optical access up to a rate of 10 Gbit\/s, and the upstream\/downstream wavelength is also capable of operating at the lower rate of 2.5 Gbit\/s. The typical distance between the optical line terminal (OLT) and an optical network unit (ONU) is 40 km, and one OLT is capable of supporting up to 256 ONUs.<\/p><\/blockquote>\n

Apparently major operators are already testing this new system with the “intention of deploying these systems in the near future<\/em>.” Operators implementing NG-PON2 will be able to reuse existing optical distribution networks (ODNs) deployed for previous generations of PONs.<\/p>\n

The wavelength plan of NG-PON2 provides for co-existence with G-PON (ITU-T G.984 series); XG-PON1 (ITU-T G.987 series); radiofrequency video overlay (ITU-T J.185; ITU-T J.186); and optical time-domain reflectometer (OTDR).<\/p>\n

Other Information<\/span><\/strong><\/h3>\n

Sadly the United Kingdom probably won’t be seeing 10Gbps FTTH<\/a>\/P broadband networks on a truly big national scale for another decade or two and even then it will take a lot of time and money to deploy, although many of the FTTH<\/a>\/P networks that have been built so far (around 400,000+ premises passed) could in theory be upgraded to support the new standards (not that you need or could even fully use such speeds).<\/p>\n

It’s worth noting that the ITU are also investigating the possibility of 25Gbps per wavelength<\/strong> over PON and they’re doing so with the aim of enhancing the capacity to beyond 100Gbps in the future, which would bring FTTH\/P services it up to the sort of standard that some core network links already deliver.<\/p>\n

Separately there has also been a third development today (ITU-T G.709\/Y.1331 – “Interfaces for the Optical Transport Network<\/em>“), which saw the ITU-T grant first-stage approval of a revision to a key ITU-T standard underlying the Optical Transport Network<\/strong> (OTN) that will enable optical transport at rates that go higher than the current 100Gbps. This is of more use for major core network links rather than domestic FTTH\/P.<\/p>\n

The new standard extends OTN with a flexible n x 100G frame format (OTUCn), which can be used for line-side interfaces up to 25.6Tbps (Terabits per second)<\/strong> over the next 15-20 years. Yes.. Terabits! Apparently the initial n \u00d7 100G FlexO standard (ITU-T G.709.1) will be fully approved by the end of 2016 and standards for n \u00d7 200G and n\/4 \u00d7 400G FlexO will be ready for when next-generation 200G or 400G client optical modules become available.<\/p>\n

Suffice to say, there’s a lot of capacity left in them thar fibre optic cables.<\/p>\n","protected":false},"excerpt":{"rendered":"

The International Telecommunication Union (ITU) has gained first-stage approval (“consent“) for a new set of international Fibre-to-the-Home (FTTH\/P) broadband standards, which can support both 40Gbps speeds (NG-PON2) and symmetrical 10Gbps speeds (XGS-PON).<\/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":[52,65,56],"class_list":["post-11268","post","type-post","status-publish","format-standard","hentry","category-uk_isp_news","tag-fibre-optic","tag-ftth","tag-fttp"],"share_on_mastodon":{"url":"","error":""},"yoast_head":"\nITU Gain Consent for New 40Gbps Ultrafast FTTH Broadband Standard - ISPreview UK<\/title>\n<meta name=\"description\" content=\"The International Telecommunication Union (ITU) has gained first-stage approval ("consent") for a new set of international Fibre-to-the-Home (FTTH\/P)\" \/>\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\/2016\/03\/itu-gain-consent-for-new-40gbps-fibre-to-the-home-broadband-standard.html\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ITU Gain Consent for New 40Gbps Ultrafast FTTH Broadband Standard - 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