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A: Here are some of the typical BackBone connections that WISP's use:  SDSL (Symmetrical Digital Subscriber Line):Speed: 128Kbps up to 1.1 Mbps Pros:
Cons:
Bottom Line: For startup WISPs who would like to provide service to a minimal amount of people or who don't have the justification for a T-1 yet at the time of service. Dedicated T-1:Speed: 56 kbps to 1.5 Mbps Pros:
Cons:
Bottom Line: For WISPs with a good customer base that are ready for the next step. Bonded T-1's (Dedicated):Speed: 3 Mbps to 6 Mbps Pros:
Cons:
Bottom Line: This is for WISPs that have exceeded or are projecting exceeding the maximum capacity of a T-1 in the near future, but can not justify the cost of a T-3 yet DS3 Usually, they just add T-1's and bond them to make it fast, so the lowest speed would be around 3 Mbps, so that would make the cost double in most situations. Dedicated T-3:Speed: 12 Mbps to 45 Mbps Pros:
Cons:
Bottom Line: This connection is for WISPs who have many customers and are ready for a much faster connection. A T-3 is a big jump from a SDSL connection or say a T-1 or a Bonded T-1, so don't buy a T-3 until you are sure that you have enough users to pay for the connection. OC-X:Speed: 53 Mbps to Infinity Pros:
Cons:
Bottom Line: A very fast connection with a very high cost. DO NOT purchase one of these connections unless you have SUBSTANTIAL financial backing!!! These connections require very expensive routers, and a lot of technical experience just to get them to work. NOTE: T-1's and T-3's are sometimes referred as DS-1's and DS-3's respectively. Hopefully this FAQ will give you some information about the different types
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