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SFP Module for Long Distance

hugo_garcia
Level 1
Level 1

Hi everybody,

i have a doubt, can i use a SFP GLC-LH-SM to MMF (Multi Mode Fiber) ??

Regards,

Hugo

5 Replies 5

Collin Clark
VIP Alumni
VIP Alumni

Yes, but there are some limitations. Please refer to Table 6 in the following document.

http://cisco.com/en/US/products/hw/routers/ps341/prod_module_installation_guide09186a00801cc731.html

HTH

We did happen upon an issue where using the LX/LH moudules over 50um MMF over distances around 200m-250m where we discovered DMD (Differential Mode delay) and had to use relatively costly mode-conditioning patch cables to confirm the condition.

The symptoms that led to this discovery were fairly limited to "input errors" on both end of some trunk links. We're talking about 1 to 2 errors a week. In our case we just went to SX modules and all issues cleared.

Our interfaces never came up and we too had to use conditioning cables.

thanks for the information, i'll check it.

regards,

Hugo

Hi,

i found next link about GLC-LH-SM SFP where it show this module to both MMF and SMF:

http://www.cisco.com/en/US/docs/interfaces_modules/transceiver_modules/compatibility/matrix/OL_6981.html

Regards,

Hugo

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