The source also said: "When Winstar signed customers, it typically provisioned back-up, leased, high-capacity circuits from the incumbent local-exchange carrier (ILEC). This is likely the biggest reason they went under.
"It's similar to the DSL providers. If you have your own considerable capital expenditures (the cost of deploying the wireless transceiver on the roof) and you have to lease back-up lines from the incumbent, where is the profit margin?"
thanx,
bill