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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">And I was about to look up which fibre rack/panel vendor I saw that made a patch panel that has a built in optical 1:2 and 2:1 switch per port so if you do
have TX/RX around the wrong way you can tell the patch panel remotely to swap them
</span><span style="font-size:11.0pt;font-family:Wingdings;color:#1F497D">J</span><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"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Of course then your patch panel needs power and adds extra loss
</span><span style="font-size:11.0pt;font-family:Wingdings;color:#1F497D">J</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<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>Andrew Warburton<br>
<b>Sent:</b> Wednesday, 13 June 2012 3:00 PM<br>
<b>To:</b> john@netniche.com.au<br>
<b>Cc:</b> ausnog@ausnog.net<br>
<b>Subject:</b> Re: [AusNOG] TX/RX Conventions<o:p></o:p></span></p>
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<p class="MsoNormal">Hey guys,<o:p></o:p></p>
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<p class="MsoNormal">No need to get too complicated, this is just Layer 1 ie. Physical layer, no rocket science required.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Andrew<o:p></o:p></p>
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<p class="MsoNormal">On 13 June 2012 13:45, <<a href="mailto:john@netniche.com.au" target="_blank">john@netniche.com.au</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">On 13.06.2012 07:21, Tom Sykes wrote:<o:p></o:p></p>
<p class="MsoNormal">I'm interested to understand which conventions/standards (if any) are<br>
being used by operators to identify the TX/RX in fibre patching<br>
panels/trays - in environments like a meet me room or datacentre.<o:p></o:p></p>
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Hi Tom,<br>
<br>
I'm not aware of any convention other than the "flip it if it doesn't work and curse shutdown-by-default policies".<br>
<br>
Cisco appear to place TX on the "left" of the optics (first port). The LC connector specification chickens out from making a distinction, and the SFP/SFP+ specifications also don't make a commitment (they allow for copper and single-fibre, after all).<br>
<br>
>From a purely logical point of view, TX should be on the "first" port of a group. This is because it's difficult to test for the absence of a signal, so if only 1 of two ports has a signal on it that should ideally be the first one you try.<br>
<br>
Otherwise, you're condemning engineers everywhere to a sequence of try port 1, nope, try port 2 - that's a 30 second gain in productivity for the industry each time they plug in a patch lead :)<br>
<br>
John<br>
<br>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal"><strong><span style="font-family:"Arial","sans-serif";color:#333399">Andrew Warburton</span></strong><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Business Development Manager | Wholesale</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-NZ" style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:black">AAPT Limited, 180 - 188 Burnley St Richmond, VIC 3121<br>
</span><strong><span lang="EN-NZ" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:black">P +61 3 </span></strong><span lang="EN-NZ" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:black">8308 3838 | <strong><span style="font-family:"Arial","sans-serif"">M +61
426 779 333</span></strong></span><o:p></o:p></p>
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<pre>This communication, including any attachments, is confidential. If you are not the intended<o:p></o:p></pre>
<pre>recipient, you should not read it - please contact me immediately, destroy it, and do not<o:p></o:p></pre>
<pre>copy or use any part of this communication or disclose anything about it.<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
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