well t1 / t3 costs usually range around 1 to 2 grand per month. You have to understand that fibre optics is very expensive, and the OC192 has 192* the bandwidth of a t3 (44.736Mbps*192 = almost 10 Gbps :Q) according to
here a t1 costs $750 - 850 per month, so $800*(192*3) = $460,800 per month
edit: actually the $750-850 is only for 1.544 Mbps, so if you do the math (44.736 * 192 / 1.544 = 5563, 5563 * 800), the total price would come to $4,450,400 per month. of course, its 10x as efficient to use an OC192 line then 5563 t1 lines, so the price drops down to around $445,040.