DB25.1 This pin out is called the RS-232 minimum cable. PIN PIN 1 ------------------- 1 Connector 1 2 ------------------- 2 Connector 2 3 ------------------- 3 7 ------------------- 7 This next one is called the RS-232 full cable. PIN PIN 1 ------------------ 1 Connector 1 2 ------------------ 2 Connector 2 3 ------------------ 3 4 ------------------ 4 5 ------------------ 5 6 ------------------ 6 7 ------------------ 7 20 ------------------ 20 Ever hear of a RS-232 Null Modem cable ? If you ever need one, just make your own one up like this. PIN PIN 20 -------------------- 6 Connector 1 6 -------------------- 20 Connector 2 Jumper 4&5 -------------------- 8 8 -------------------- 4&5 Jumper 2 -------------------- 3 3 -------------------- 2 7 -------------------- 7 One thing to always keep in mind. You'll never BLOW anything if you make a mistake. Also some CPU's hooked to TNC's won't work just right or lock up once in a while. Try this if your terminal program acks up or locks up. On the CPU end of your DB-25 connector, jumper pins 6, 8 and 20 together. Hope the above helps and saves you money. Why give a computer store big buxs when you can do it yourself and save! 73 de Bill N8FIS @ N8FIS -:- Fremont, OH. -:-