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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">And be aware of the speed / distance limitations<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";background:white">For OM1, typical transmission speed and distance limits are 100 Mbit/s for distances up to 2 km (</span><a href="http://en.wikipedia.org/wiki/100BASE-FX" title="100BASE-FX"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:windowtext;background:white;text-decoration:none">100BASE-FX</span></a><span style="font-size:10.0pt;font-family:"Arial","sans-serif";background:white">),
1 Gbit/s to 220–550 m (</span><a href="http://en.wikipedia.org/wiki/1000BASE-SX" title="1000BASE-SX"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:windowtext;background:white;text-decoration:none">1000BASE-SX</span></a><span style="font-size:10.0pt;font-family:"Arial","sans-serif";background:white">),
and 10 Gbit/s to 300 m (</span><a href="http://en.wikipedia.org/wiki/10_Gigabit_Ethernet#10GBASE-SR" title="10 Gigabit Ethernet"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:windowtext;background:white;text-decoration:none">10GBASE-SR</span></a><span style="font-size:10.0pt;font-family:"Arial","sans-serif";background:white">)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";background:white">And, if each hop that you refer to is a patching point, you will introduce loss along the way.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";background:white">Kev<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> ausnog-bounces@lists.ausnog.net [mailto:ausnog-bounces@lists.ausnog.net]
<b>On Behalf Of </b>Christopher Pollock<br>
<b>Sent:</b> Friday, 20 April 2012 10:55 AM<br>
<b>To:</b> Qui Le<br>
<b>Cc:</b> ausnog@lists.ausnog.net<br>
<b>Subject:</b> Re: [AusNOG] Fiber connectivity<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sounds like you're using single mode transceivers with multimode fibre there. Since SM optics rely on total internal reflection and multimode is basically bendy plastic, that will probably never work. You need some multimode SX SFPs.<o:p></o:p></p>
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<p class="MsoNormal">Cheers,<br clear="all">
--<br>
Christopher Pollock,<br>
io Networks Pty Ltd.<o:p></o:p></p>
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<p class="MsoNormal">e. <a href="mailto:chris@ionetworks.com.au" target="_blank">
chris@ionetworks.com.au</a><br>
p. 1300 1 2 4 8 16<o:p></o:p></p>
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<p class="MsoNormal">d. 07 3188 7588<o:p></o:p></p>
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<p class="MsoNormal">m. 0410 747 765<o:p></o:p></p>
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<p class="MsoNormal">f. 07 3245 0843 <o:p></o:p></p>
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<p class="MsoNormal">skype: christopherpollock<o:p></o:p></p>
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<p class="MsoNormal"><a href="http://twitter.com/chrisionetworks" target="_blank">twitter.com/chrisionetworks</a><o:p></o:p></p>
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<p class="MsoNormal"><a href="http://www.ionetworks.com.au" target="_blank">http://www.ionetworks.com.au</a><br>
In-house, Outsourced.<o:p></o:p></p>
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<br>
<o:p></o:p></p>
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<p class="MsoNormal">On Fri, Apr 20, 2012 at 10:44 AM, Qui Le <<a href="mailto:QLe@sydneyoperahouse.com">QLe@sydneyoperahouse.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">We run 550m of OM1 fibre from our Cisco core to a remote site over 6 hops included rack to rack and we can not<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">seem to get any connectivity. Using both Cisco GLC-LH-SM transceivers at both the Core & access Switch.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Does anyone know if there are hops limitations for long haul fibres.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Any advise is much appreciated.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thanks<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><b><span style="font-family:"Arial","sans-serif";color:#7E7E7E">Qui Le</span></b><o:p></o:p></p>
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