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Null Modem and Data Cables - Types and Uses  

Most good computer stores sell Data Transfer Cables. But they must be NULL MODEM CABLES (Commonly known as Laplink Cables) Use a 9 to 9 pin,     9 to 25 pin or a 25 to 25 pin Serial Null Modem Cable as required, or you can buy a four-way Laplink Serial Cable which has 9 and 25 pin heads at both ends or use a 25 to 25 Male Parallel DATA Cable. You cannot however Upload LapLink or FastLynx remotely via a Parallel cable. You can also use a Jumpered Breakout Connector such as a Interlink Printer Cable Converter along with your Parallel Printer Cable. But you cannot use a Serial Printer Cable.

Internet Resources:

Microsoft Knowledge Base Q142065 ~ Cables That Are Compatible with Direct Cable Connection

Please Note ~ If Microsoft have removed or changed above links (Again) - Try typing description into the Microsoft Search Box to find new links.

Web Article ~ Connecting 2 Computers for Games or Transferring Files

http://www.technick.net/ for more info on Cable Pinouts and more.

or

Build your own Data Transfer Cables as Detailed Below:

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

  Here are the Pinout Connections:    

                                

Serial (2-bit transfer) uses 7 wires    ~    Parallel (4-bit transfer) uses 15 wires.

Serial Null Modem Cable
 DB9 - DB9 (Female)
 2 -- 3  Receive-Transmit
3 -- 2 Transmit-Receive
4 -- 6 DTR-DSR
5 -- 5 Ground-Ground
6 -- 4 DSR-DTR
7 -- 8 RTS-CTS
8 -- 7 CTS-RTS
DB25 - DB25 (Female)
2 -- 3 Receive-Transmit
3 -- 2 Transmit-Receive
20 -- 6 DTR-DSR
7 -- 7 Ground-Ground
6 -- 20 DSR-DTR
4 -- 5 RTS-CTS
5 -- 4 CTS-RTS
Parallel Data Cable   
DB25 - DB25 (Male)
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

Software Download ~ Laplink Pro 4.0 for DOS  or FastLynx 2.0 for DOS