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how to connect 80KM Fiber optice cable

We have high distace own Fiber optic cable (more than 70KM), need to connect two of our Cisco Provided SFP Port, further the switches are connected to the Router.
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hussainha
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hussainha
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hussainhaAuthor Commented:
Urgent reply will be highly appreciated
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hoffmanconsultingllcCommented:
Is the fiber single mode or multi mode? What protocols are your planning on running across this link?
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hussainhaAuthor Commented:
The fiber is single mode and we are planning to use Ethernet protocol IEEE 802.1x (  which mean they will work as LAN)
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hoffmanconsultingllcCommented:
what are the models of your switches and routers at each end. Will you be utilizing the same IP subnet at both ends or different?
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hussainhaAuthor Commented:
We did not decide which models we will use
And yes we will use the same subnet at both ends
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hoffmanconsultingllcCommented:

Cisco switch gear will not be able to interconnect the two sites as the longest distance a single mode fiber SFP can go is 70KM. Read this for reference, http://www.cisco.com/en/US/prod/collateral/modules/ps5455/ps6577/product_data_sheet0900aecd8033f885.html 
I would suggest reaching out to the cisco or juniper representative in your area or call the 800 number to see if they have a router card that can handle that distance. There are companies that make SFP's that can go 80KM but that is a best case scenario; you have to take into account the db loss, splices and so on. Here is a company that makes SFP's that can go 80KM however i do not know if they are certified with Cisco gear. http://www.skylaneoptics.com/ 
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