[AusNOG] MMF fiber OM3 cabling versus OM1 patch leads

[Mark Foster]

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.

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 ... !

Mark.



On 27/03/2014 4:57 p.m., Qui Le wrote:
>
> Hi
>
> Our Data centre built several years ago using multimode to be 
> compatibility with existing MMF infrastructure.
>
> 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.
>
> 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.
>
> Is it worthwhile to replace these fiber Patch leads to OM3 ?
>
> Any advice is much appreciated.
>
> *Qui Le*
>
>
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