dslreports logo
site
 
    All Forums Hot Topics Gallery
spc

spacer




how-to block ads


Search Topic:
uniqs
9
share rss forum feed

lutful
... of ideas
Premium
join:2005-06-16
Ottawa, ON
kudos:1
reply to spectrumhead

Re: SFP module for 100km

I am helping some high school classmates who are installing fiber all over the city where I was born. They are buying similar SFP modules from China for $500 max. So $1250 seems a bit high. But USA/Canada distributors have more overhead cost and you are also getting some assurance that they won't substitute a sub-par clone.

BTW my friends borrow Fluke test set from the local engineering university to measure the loss of the fiber length before and after install and to check the SFPs against spec. They learned the test process using Fluke's excellent instruction videos. Maybe you can do the same and determine exact losses for yourself.


spectrumhead

join:2009-05-03

Is there any link for those Chinese SFPs that I can check ? There is a big difference in price between $500 and $1250.



54067323

join:2012-09-25
Tuscaloosa, AL

said by spectrumhead:

Is there any link for those Chinese SFPs that I can check ? There is a big difference in price between $500 and $1250.

Beware of seconds, they may match the specs on paper, but once in service and aging they may not turn out to be such a good deal long term and if you do not have a light meter, you will not a have a benchmark to work from if and when the link fails.


lutful
... of ideas
Premium
join:2005-06-16
Ottawa, ON
kudos:1
reply to spectrumhead

said by spectrumhead:

Is there any link for those Chinese SFPs that I can check ? There is a big difference in price between $500 and $1250.

They are Huawei "compatible" SFPs made in many different factories.

This is first link in my Google search but beware of such online stores.
»www.pc-wholesale.com/transceiver···sfp.html