5 4 3 2 1
                 
\             /
\         /
         
9 8 7 6

Pin In/Out Signal Name
                        
1    I    Data Carrier Detect
2    I    Receive Data
3    O    Transmit Data
4    O    Data Terminal Ready
5    na   Signal Ground
6    I    Data Set Ready
7    O    Request to Send
8    I    Clear to Send
9    I    Ring Indicate

Notes:   The signals on pins 1, 6, 8, and 9 are represented at port
n+6 (where n is the base port; e.g., at port 3feH on COM1).

  A serial port cable for normal data transfer with the DOS
InterLink utility uses only three wires.  For remote copy
operations, you need a 7-wire null-modem cable.  See

- -

Serial Port Connector - 9-pin