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...ect costs about 500-550 per 24 channel virtual pri. This compared to a true "ISDN/PRI" which can costs between "200-500" dollars depending who you talk to. We also have to take into consideration the hardware needed for either setup i.e.: * Option 1: SIP Proxy * Option 2: media gatweays, multiplexers, media server.... Even though it was natural to talk about "pricing", this is still not what we are interested in knowing. What we are interested in finding out is: * How are service providers that offer "virtual pris" interconnected with their suppliers? I woul...