I have never worked a TelRad system before. This the system has RJ-11/6 connectors for stations and the CO lines. If connect a phone directly to the KSU using a six connductor line cord it works just fine. I neeed to know the proper pin outs for the modular jacks. Pin 3 = WT/BL Pin 4 = Bl/WT etc. When I checked the other cables the working phones the RJ plugs all seemed to be terminated different, so I can only assume they terminated diffently at each station jack. Any information those of who install these will be greatly helpful.