right now, bus 2 is 32 digital sets. bus 3 is trunks, 3.0 is 4 copper lines. 3.1-3.4 are loop, but have nothing on them. Bus 4 is station, 5 and 6 are station, but unequipped. 7 is my PRI. I am adding the 4x16 card to add an additional 4 copper lines.