I have a UG50 with an E1 card. I have programmed many 15M PRI spans, but this 2M which is an E1, has me scratching my head on one point: in a highway of 4 groups (or 32 ports), where do you program the 30 voice channels and where do you program the 2 data channels? I'm looking at the UG50 manual, and for the life of me I don't understand the very diagram NEC intended to use to answer this question...