Definition of the 2300 I/O cable pinout

The following is the pinout for the 2300 tablet:

25-PIN RS-232 Cable

Tablet End------------Computer End
8-pin DIN               RS-232 25-pin

                          20   DTR
1  GND.................7  GND
3  RX....................2  TX
2................NC......6  DSR
4................NC......4  RTS
5  TX.....................3  RX
6................NC......5  CTS
7  +12..................24  +12
8................NC......1  GND

-Tie pins 20 and 6                   
- Tie pins 4 and 5

NC=No Connection