LapLink Cable Design

Build transfer cables or use a jumpered breakout connector. Here are the pin connections. Serial (2-bit transfer) uses seven wires, parallel (4-bit transfer) needs 15 wires.

STANDARD DISCLAIMER:
You're on your own -- If you don't know what you're doing, don't try it!

Serial LapLink Cable
DB9 - DB9
 2 -- 3 Receive-Transmit
3 -- 2Transmit-Receive
4 -- 6DTR-DSR
5 -- 5Ground-Ground
6 -- 4DSR-DTR
7 -- 8RTS-CTS
8 -- 7CTS-RTS
DB25 - DB25
2 -- 3Receive-Transmit
3 -- 2Transmit-Receive
20 -- 6DTR-DSR
7 -- 7Ground-Ground
6 -- 20DSR-DTR
4 -- 5RTS-CTS
5 -- 4CTS-RTS
Parallel
LapLink Cable
1 -- 1
2 -- 15
3 -- 13
4 -- 12
5 -- 10
6 -- 11
10 -- 5
11 -- 6
12 -- 4
13 -- 3
14 -- 14
15 -- 2
16 -- 16
17 -- 17
25 -- 25

 
  DynoTech Software