Direct connecting two (old fashioned) modems or telephones.

Ever wanted to reuse those old telephones and or modems using just two wires. This instructable shows you several options. Get a continuity tester to make your job easier.

Step 1: Circuit 1.

This first circuit if you just want to use a battery.  For short distances use the nine volt battery for compactness.

Comments

[logamuthu]

Very useful!

[blkhawk]

This is very useful information to create some sort of simple communication inside a home or building. Thank you for posting.

[Computothought]

Your welcome.