<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
color:black;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";
color:black;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";
color:black;
mso-fareast-language:EN-US;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
span.EmailStyle19
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:"Consolas","serif";
color:black;
mso-fareast-language:EN-US;}
span.EmailStyle22
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-AU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>If your optic supports it, check the DOM information, I guarantee your loss margins are higher than they should be, though likely still well within tolerable margins given the distance you are running it.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Unless you are running higher distance lengths you would be surprised how tolerant they can be, though it’s not necessarily good for the optics either...<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Mark is definitely spot on, get it fixed when you are able to plan it before it becomes a problem!<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='color:#1F497D;mso-fareast-language:EN-AU'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:#333333;mso-fareast-language:EN-AU'>Ayden Beeson</span></b><span style='color:#1F497D;mso-fareast-language:EN-AU'><o:p></o:p></span></p></div><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-AU'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-AU'> AusNOG [mailto:ausnog-bounces@lists.ausnog.net] <b>On Behalf Of </b>Mark Foster<br><b>Sent:</b> Thursday, 27 March 2014 4:32 PM<br><b>To:</b> Qui Le; ausnog@lists.ausnog.net >> "ausnog@lists.ausnog.net"<br><b>Subject:</b> Re: [AusNOG] MMF fiber OM3 cabling versus OM1 patch leads<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Your OM1 patch leads have a 62.5 micron core, connected to an OM3 50 micron core. So you are probably seeing a small amount of loss - but perhaps it's so small it's negligable. In particular I suppose the transmit side being smaller than the receive side, is likely to be 'doable' with minimal losses.<br><br>I would certainly ensure you have the same type of fibre end-to-end to ensure reliable service; do it as part of a planned outage now, before it becomes an unplanned outage later when someone 'nudges' a cable and ruins things ... !<br><br>Mark.<br><br><br><o:p></o:p></p><div><p class=MsoNormal>On 27/03/2014 4:57 p.m., Qui Le wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Hi<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Our Data centre built several years ago using multimode to be compatibility with existing MMF infrastructure.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Recently we have an electrician audit report that our fibre cabling between our inter-racks are MMF OM3 but the patch leads we use are OM1.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>We are not sure if this cause performance issues or data loss but we cannot see any errors in our fiber switches or in our Cores.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Is it worthwhile to replace these fiber Patch leads to OM3 ?<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Any advice is much appreciated.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:#999999;mso-fareast-language:EN-AU'>Qui Le</span></b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#999999;mso-fareast-language:EN-AU'><br><br><br></span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-AU'><br clear=all>Please consider the environment before printing this email.<br>=====This message is intended for the addressee(s) named and may contain confidential information.<br>If you are not the intended recipient, please delete it and notify the sender.<br>Views expressed in this email are those of the individual sender and are not necessarily the views of the Sydney Opera House Trust=====<br><br><br><br><o:p></o:p></span></p><pre>_______________________________________________<o:p></o:p></pre><pre>AusNOG mailing list<o:p></o:p></pre><pre><a href="mailto:AusNOG@lists.ausnog.net">AusNOG@lists.ausnog.net</a><o:p></o:p></pre><pre><a href="http://lists.ausnog.net/mailman/listinfo/ausnog">http://lists.ausnog.net/mailman/listinfo/ausnog</a><o:p></o:p></pre></blockquote><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-AU'><o:p> </o:p></span></p></div>
<P><A title="Charles Sturt University" href="http://www.csu.edu.au/"><IMG
alt="Charles Sturt University"
src="cid:csu-logo6cf4.bmp"
border=0></A></P>
<P
style="FONT-SIZE: 8px; COLOR: #c42129; FONT-FAMILY: Arial, Helvetica, sans-serif">| ALBURY-WODONGA | BATHURST | CANBERRA | DUBBO | GOULBURN | MELBOURNE | ONTARIO | ORANGE | PORT
MACQUARIE | SYDNEY | WAGGA
WAGGA |</P>
<HR>
<SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 9px; FONT-FAMILY: Arial, Helvetica, sans-serif">LEGAL
NOTICE</SPAN><BR><SPAN
style="FONT-SIZE: 9px; FONT-FAMILY: Arial, Helvetica, sans-serif">This email
(and any attachment) is confidential and is intended for the use of the
addressee(s) only. If you are not the intended recipient of this email, you must
not copy, distribute, take any action in reliance on it or disclose it to
anyone. Any confidentiality is not waived or lost by reason of mistaken
delivery. Email should be checked for viruses and defects before opening.
Charles Sturt University (CSU) does not accept liability for viruses or any
consequence which arise as a result of this email transmission. Email
communications with CSU may be subject to automated email filtering, which could
result in the delay or deletion of a legitimate email before it is read at CSU.
The views expressed in this email are not necessarily those of CSU.</SPAN>
<P style="FONT-SIZE: 9px; FONT-FAMILY: Arial, Helvetica, sans-serif"><A
style="COLOR: #c42129" href="http://www.csu.edu.au">Charles Sturt University in
Australia</A> The Grange Chancellery, Panorama Avenue, Bathurst NSW Australia
2795 (ABN: 83 878 708 551; CRICOS Provider Number: 00005F (National)). TEQSA
Provider Number: PV12018 <BR><A style="COLOR: #c42129"
href="http://www.charlessturt.ca/">Charles Sturt University in Ontario</A> 860
Harrington Court, Burlington Ontario Canada L7N 3N4 Registration: <A
style="COLOR: #c42129" href="http://www.peqab.ca">www.peqab.ca</A></P><SPAN
style="FONT-SIZE: 9px; FONT-FAMILY: Arial, Helvetica, sans-serif">Consider the
environment before printing this email.</SPAN> <div style="color:#999999;font-size:11px;font-family:verdana"><br>Disclaimer added by <b>CodeTwo Exchange Rules 2007</b><br><a href="http://www.codetwo.com">www.codetwo.com</a></div><br></body></html>