A hundred years ago I installed Tele Resources 32 PBXs. The single line stations used shielded quad for station cable. We would cut down the 4 wires and then the drain (10 cables on each side of a 66 M1-50). We would then cross connect the 2 pairs for each station and a single wire ground to each of the drains. This was all on standard 66 Blocks.

What application are you trying to address?

Sam

"Where are we going and why are we in this hand basket?"