Most of those blocks are spares. The first column is for the partner, which I can't see needing any more in a 2000sf house. The second and third column are station blocks for the 1A2, and the fourth and fifth column are spares. The three blocks under the partner are, from left to right, CO lines(essentially a demarc), Partner CO lines, and 1A2 CO lines. Some of the Partner lines come from the left hand CO block, and some come from the 1A2 block because they go through Melco s64-1 A lead adapters. The four "pstn" lines go through the A-lead adapters, the rest of the lines are all C*net lines. Line 1 is our comcast line, lines 2&3 are the ooma lines, and line 4 is my google voice line, made into copper by an obihai ATA. My monthly phone bill is under $10. Though, you definitely get what you pay for. My power was out for an hour this morning, and despite having the router on a circuit that runs on the generator, nothing worked because comcast hasn't changed the batteries in the node down the street... ever.
