cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
1075
Views
5
Helpful
5
Replies
Highlighted
Beginner

Use 40Km SFP for fiber distance below 10Km

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 ?

Regards, Nagis
5 REPLIES 5
Highlighted
Hall of Fame Community Legend

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.

Highlighted
VIP Expert

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.

Highlighted
Contributor

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

Highlighted

What harm can come from attenuating on the TX local link?

Highlighted

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

 

Content for Community-Ad