Null Phone Adapters for Sale

IMG_4031I am currently selling adapters that I have built that allow you to connect two computers together via modem’s without the need for any phone service. These are very simple to use:

  1. Plug phone cables into the adapter from the 2 computer’s modems
  2. Plug 9volt battery into adapter

From here you would just use the terminal programs (or BBS programs) you have on the 2 computers to get them to talk to each other.

To purchase one via eBay click here.

IMG_4029If you want a more permanent solution than the 9 volt battery you can replace it with a DC adapter, red is positive (+), black is negative. I have tested it with voltages from 4.5 volts up to 12 volts though I recommend sticking with 9 volt.

If you want to build one yourself you can look at this webpage for the details on how it works ( Parts wise you will end up spending about the same as I am selling them for.

To purchase one via eBay click here.

Direct connect Adam to PC via Adam Link Modem

This is relatively easy to do. This web page ( describes how to create a simple circuit to simulate a phone line. Once you have this you can plug the Adam Link modem into it and it into a PC. On the PC start HyperTerminal (or other terminal program).

To connect:

  1. On Adam set modem parameters using AdamLink to 8 characters, 1 stop bit, no parity
  2. On PC type ATE1X1 then enter to the modem. This will enable modem commands being echoed to screen and tells modem to ignore lack of dial tone
  3. On PC type ATDT123456789 then enter to dial modem, a long number gives you a few extra seconds to get to the Adam
  4. On Adam select Answer then select Online

Once you have connect the connection will remain if you reset the Adam to load CP/M or SmartBasic

Replacement Adam Keyboard Cable

rj11After a little research I realized that the keyboard cable is not wired like most cables.

Standard six wire phone cable:

1 ------> 1
2 ------> 2
3 ------> 3
4 ------> 4
5 ------> 5
6 ------> 6

Adam keyboard cable:

1 ------> 6
2 ------> 5
3 ------> 4
4 ------> 3
5 ------> 2
6 ------> 1

I had to make a new cable for an Adam that I purchased that didn’t have one and wiring it like this just fine.