SFP Module for Long Distance

[hugo_garcia]

Hi everybody,

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

Regards,

Hugo

[Collin Clark]

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

[bjw]

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.

[Collin Clark]

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

[hugo_garcia]

thanks for the information, i'll check it.

regards,

Hugo

[hugo_garcia]

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