I have a S8500 with 2 G650s at site A. A G350 with s8300 at sites B and C. There are 2 tn2313 cards in site A and a mm710 and both G350s. Is there any way to use PRI with DCS to connect the switches? Shouldn't they just be connected through their network? Can we use the circuits for data and just put a router on each end, but then why did they give me the tn2313s and the mm710s?