Do I need to fit a conditioning patch cable?

Unanswered Question
Jun 3rd, 2010


I have 2 Catalyst 3750E series switches and need to connect them to each other. I would like to connect them using a 10 GB link via the existing Multimode fibre available (62.5 micron core). However, this cable is between to fibre patch panels approx 100 m apart. I would like to use the X2-10GB-LRM adaptors, but depending on which datasheet I read, I'm unsure weather i need to use conditioning patch cables at each end. I'm guessing these would be CAB-GELX-625 if required, although some datasheets say you only need them over 300 m? Confussed!!

Any pointers would be much appriciated.



I have this problem too.
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Giuseppe Larosa Thu, 06/03/2010 - 07:48

Hello Steve,

you should be fine in connecting using 100 meters fiber, the problem with single mode is when the fiber cable is too short and the signal can saturate the receiver so an attenuator is introduced.

Hope to help


stevesmith94 Thu, 06/03/2010 - 08:01

Hi Giuseppe,

So the fact im using multimode fibre and multimode patch cables, I shouldn't need to attenuate the singal, thus removing the requirement for conditioning patches?


Reza Sharifi Thu, 06/03/2010 - 08:37


With MM fiber and MM patch panel and your distance you are good to go.  No need for to attenuate the signals




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