<html><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif;font-size:16px"><div id="yui_3_16_0_1_1423205443739_27075" dir="ltr"><span id="yui_3_16_0_1_1423205443739_27081">I don't care as much as to whether it is active or passive optical - symmetric bandwidth is the key. But hey, asymmetric bandwidth sounds right for residential so it must be right (despite TCP being ACK clocked and delayed ACKs due to queuing on the lower bandwidth upstream direction reducing throughput in the downstream direction ... which is what RFC3449 explains, and BCP89/RFC3819, "Advice for Internet Subnetwork Designers" further states.). Perhaps this is one of the best examples of people following their intuition rather than how things would actually best work.</span></div><div id="yui_3_16_0_1_1423205443739_27075" dir="ltr"><span><br></span></div><div id="yui_3_16_0_1_1423205443739_27075" dir="ltr"><span id="yui_3_16_0_1_1423205443739_27157">IEEE EPON is better, none of this 'we need to provide legacy ATM and T1 services', because, well, the IEEE invented Ethernet, and if that is all the network is going to carry ....</span></div><div id="yui_3_16_0_1_1423205443739_27212"><br></div><div dir="ltr" id="yui_3_16_0_1_1423205443739_27220">Even if Google are using GPON, they're still using it to provide symmetric bandwidth:</div><div dir="ltr" id="yui_3_16_0_1_1423205443739_27213"><br></div><div dir="ltr" id="yui_3_16_0_1_1423205443739_27214"><a href="http://networkmatter.com/2014/02/27/google-fibers-brewing-little-secret-exposed-its-gpon/" id="yui_3_16_0_1_1423205443739_27218">Google Fiber’s Brewing Little Secret Exposed: It’s GPON!</a><br></div><div style="width:450px; font-family: 'Georgia', 'Times', 'Times New Roman', 'serif';margin-top:5px; margin-bottom: 5px; background-color: #ffffff;" contenteditable="false" id="enhancrCard_0" class="link-enhancr-attachment link-enhancr-element"><table class="link-enhancr-element" cellspacing="0" cellpadding="0" border="0" style="width:450px; height:170px; position: relative; display: block;" id="yui_3_16_0_1_1423205443739_27367"><tbody id="yui_3_16_0_1_1423205443739_27366"><tr class="link-enhancr-element"><td class="link-enhancr-element" colspan="8" style="height: 1px; background-color: #e5e5e5; font-size: 1px; border-collapse: collapse;"><div class="link-enhancr-element" style="height: 1px; background-color: #e5e5e5; font-size: 1px; line-height:0px;"> </div></td></tr><tr class="link-enhancr-element" id="yui_3_16_0_1_1423205443739_27370"><td rowspan="5" class="link-enhancr-element" style="width: 1px; background-color: #e5e5e5; font-size: 1pt; border-collapse: collapse;"><div class="link-enhancr-element" style="width: 1px; background-color: #e5e5e5; font-size: 1pt;"> </div></td><td class="link-enhancr-element" rowspan="5" style="vertical-align: middle; width: 168px; height: 168px; background-color: #000000;border-collapse: collapse;" id="yui_3_16_0_1_1423205443739_27371"><div class="link-enhancr-element" style="width: 168px;" align="center"><a href="http://networkmatter.com/2014/02/27/google-fibers-brewing-little-secret-exposed-its-gpon/" class="link-enhancr-card-urlWrapper link-enhancr-element" style="text-decoration: none !important; color: #000000 !important;"><img alt="image" src="http://networkmatter.files.wordpress.com/2013/09/nmblog-keith.jpg" class="link-enhancr-thumbnail-image link-enhancr-element" width="168" height="103" style="display: block; margin: auto;" data-id="474ae797-e07e-29da-d56f-1b35697ecfa0"></a></div></td><td rowspan="5" class="link-enhancr-element" style="width: 1px; background-color: #e5e5e5; font-size: 0pt; border-collapse: collapse;"><div class="link-enhancr-element" style="width: 1px; background-color: #e5e5e5; font-size: 1pt;"> </div></td><td rowspan="5" class="link-enhancr-element" style="width: 14px; background-color: #ffffff; font-size: 0pt; border-collapse: collapse;" id="yui_3_16_0_1_1423205443739_27369"><div class="link-enhancr-element" style="width: 14px; background-color: #ffffff; font-size: 14pt;" id="yui_3_16_0_1_1423205443739_27368"> </div></td><td colspan="2" class="link-enhancr-element" style="height: 6px; background-color: #ffffff; font-size: 0pt; border-collapse: collapse;"><div class="link-enhancr-element" style="height: 6px; background-color: #ffffff; font-size: 6pt;"> </div></td><td rowspan="5" class="link-enhancr-element" style="width: 20px; background-color: #ffffff; font-size: 0pt; border-collapse: collapse;"><div class="link-enhancr-element" style="width: 20px; background-color: #ffffff; font-size: 20pt;"> </div></td><td class="link-enhancr-element" rowspan="5" width="1" style="width: 1px; background-color: #e5e5e5; font-size: 1pt; border-collapse: collapse;"><div class="link-enhancr-element" style="width: 1px; background-color: #e5e5e5; font-size: 1pt;"> </div></td></tr><tr id="yui_3_16_0_1_1423205443739_27365"><td class="link-enhancr-element" colspan="2" style="width: 100%; vertical-align: middle; font-family: 'Georgia', 'Times', 'Times New Roman', 'serif';" id="yui_3_16_0_1_1423205443739_27364"><div class="link-enhancr-text-part link-enhancr-element" style="line-height:16.5px; background-color: #ffffff; height: 135px; width: 245px;" id="yui_3_16_0_1_1423205443739_27363"><div class="link-enhancr-element" style="word-wrap: break-word; word-break: break-all;" id="yui_3_16_0_1_1423205443739_27362"><span class="link-enhancr-element icon icon-shrink link-enhancr-toggle"></span><span class="link-enhancr-element icon icon-close link-enhancr-delete"></span><a href="http://networkmatter.com/2014/02/27/google-fibers-brewing-little-secret-exposed-its-gpon/" class="link-enhancr-card-urlWrapper link-enhancr-element" style="text-decoration: none !important; color: #000000 !important; line-height: 100%; font-size: 18px; display: block;" id="yui_3_16_0_1_1423205443739_27361"><span class="link-enhancr-element link-enhancr-card-title" style="margin: 0; font-weight: normal;margin-bottom: 3px; font-size: 18px; line-height: 21px; max-height: 43px; color: #000000; overflow: hidden !important; display: inline-block;" id="yui_3_16_0_1_1423205443739_27360">Google Fiber’s Brewing Little Secret Exposed: It’s GPON!</span></a><div style="font-size: 13px; line-height: 20px; color: #999999; max-height: 81px; font-family: 'Georgia', 'Times', 'Times New Roman', 'serif';overflow: hidden;" class="link-enhancr-card-description link-enhancr-element">Summary Bullets: Google Fiber’s use of GPON, instead of active/P2P Ethernet FTTH, while somewhat shocking at first, is not surprising upon further examination, as G...</div></div></div></td></tr><tr><td colspan="2" class="link-enhancr-element" style="height: 4px; background-color: #ffffff; font-size: 0pt; border-collapse: collapse;"><div class="link-enhancr-element" style="height: 4px; 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background-color: #e5e5e5; font-size: 1px; line-height:0px"> </div></td></tr></tbody></table></div><div><br></div> <div style="font-family: Helvetica Neue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif; font-size: 16px;" id="yui_3_16_0_1_1423205443739_27079"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif; font-size: 12px;" id="yui_3_16_0_1_1423205443739_27078"> <div dir="ltr" id="yui_3_16_0_1_1423205443739_27077"> <hr size="1"> <font size="2" face="Arial" id="yui_3_16_0_1_1423205443739_27076"> <b><span style="font-weight:bold;">From:</span></b> James Andrewartha <trs80@ucc.gu.uwa.edu.au><br> <b><span style="font-weight: bold;">To:</span></b> Mark ZZZ Smith <markzzzsmith@yahoo.com.au> <br><b><span style="font-weight: bold;">Cc:</span></b> Mark Delany <g2x@juliet.emu.st>; "ausnog@lists.ausnog.net" <ausnog@lists.ausnog.net> <br> <b><span style="font-weight: bold;">Sent:</span></b> Saturday, 7 February 2015, 20:38<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [AusNOG] DSL G.Fast Details<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1423205443739_27236"><br>On Tue, 3 Feb 2015, Mark ZZZ Smith wrote:<br clear="none"><br clear="none">> * I agree it should be the end game if you going to deploy FTTP. Google <br clear="none">> got it right - symmetric active FTTP is the real end game if you're <br clear="none">> going to go to the expense of deploying fibre (as its all going to carry <br clear="none">> Internet traffic and, as described in RFC3449, the best links to carry <br clear="none">> Internet protocols over, and more specifically TCP, are symmetric ones.)<br clear="none"><br clear="none">Is Google Fiber active ethernet? [1] claims that apart from one legacy <br clear="none">network it bought for $1 they use GPON, and their Network Engineer job [2] <br clear="none">lists "Familiarity with GPON and optical fiber access technologies."<br clear="none"><br clear="none">[1] <a shape="rect" href="http://networkmatter.com/2014/02/27/google-fibers-brewing-little-secret-exposed-its-gpon/" target="_blank">http://networkmatter.com/2014/02/27/google-fibers-brewing-little-secret-exposed-its-gpon/</a><div class="qtdSeparateBR"><br><br></div><div class="yqt6312461999" id="yqtfd35824"><br clear="none">[2] </div><a shape="rect" href="https://www.google.com/about/careers/search#!t=jo&jid=200001" target="_blank">https://www.google.com/about/careers/search#!t=jo&jid=200001</a><br clear="none"><br clear="none">-- <br clear="none"># TRS-80 trs80(a)ucc.gu.uwa.edu.au #/ "Otherwise Bub here will do \<br clear="none"># UCC Wheel Member <a shape="rect" href="http://trs80.ucc.asn.au/" target="_blank">http://trs80.ucc.asn.au/ </a>#| what squirrels do best |<br clear="none">[ "There's nobody getting rich writing ]| -- Collect and hide your |<br clear="none">[ software that I know of" -- Bill Gates, 1980 ]\ nuts." -- Acid Reflux #231 /<div class="yqt6312461999" id="yqtfd80337"><br clear="none"></div><br><br></div> </div> </div> </div></body></html>