10-23-2015 09:10 PM - edited 03-05-2019 02:35 AM
HI All,
Can I use 40Km SFP for Fiber distance below 10Km ? I knew 10Km SFP is recommended, but putting aside costing, do I have any drawback using 40Km SFP in this environment ?
10-23-2015 10:55 PM
Yes and no.
In ideal condition, the answer is no, however, if forced with the issue please consider the risk of permanently burning out the optics of the already-expensive SFP.
10-24-2015 01:37 AM
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
It depends on the optics. Some might be just fine, some could be damaged.
What you could do is use an attenuator to insure RX is within the spec range.
11-10-2015 05:02 AM
Yes you CAN, BUT
you must measure your RXlevel at both far ends. You need to procure sutable opitcal attenuators for both ends. it is likley that the optical losses are symmetrical , however it is best to testand not assume
look at the SFP input range, ensure that the incoming sigbal does not exceed the range.
the opitcal attenuators are placed at the far end RX link and NOT on the TX local link
you CAN destroy the SFP receiver
11-10-2015 04:16 PM
What harm can come from attenuating on the TX local link?
11-11-2015 12:37 PM
you may not drop enough db light than the RX will have no much db light, the RX reciever may die
you may drop too much db light than the RX may no see enough light. thus it wont work
thus you need to measure your RX db level at both far ends BEFORE you buy the correct opitcal attenuators
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: