PK232SAT.5 All you need do is wire in 3 double throw switches with the center pins of JP4, JP5 and JP6 connected to the center lugs of your double throw switches. Then wire the inside and outside pins of JP4, JP5 and JP6 to these switches so that the JP center pins are switched to the inside pins for the internal PK-232 modem or to the outside pins for your external modem. These switches can be mounted on the front panel where space permits (like the upper right corner under "model PK-232"). To ease future servicing I recommend not soldering directly to the pins on JP4, JP5 and JP6. Check your catalogs (or local electronic supply store) for DIP connectors that are .100 center/.040 square hole size and wire your switches to them. Be sure to mark each connector so you'll always reconnect them to the correct pins in the future. A look at the PK-232 schematic will clearly show you what you are doing. A triple pole double throw switch would be nice if you can find one. I made do by ganging a SPDT and DPDT together. CONTINUED IN FILE PK232SAT.2 Downloaded From P-80 International Information Systems 304-744-2253