This Instructable will teach you how to tap your own phone lines and record every call, which even works with cordless phones.This isn't the cheapest thing in the world to make, but it is awesome.
Step 1: Supplies
You will need to get a couple thing to do this.
1) Radioshack Recorder Control
2) A Recorder With Rem And Microphone Jacks (plugs)
3) Phone Line Obviously
4) 1-to-3 Jack Adapter If you have More Than One Phone
5) Extra Phone Cord
6) 8-Conductor Inline Coupler
Step 2: Link the Lines Together
If you have more than one phone in the house, then you are going to need to get a Recoton Dual Modular T-Adapter. You might also need some extra phone cord to do this. If you do need extra cord you will oviously need an 8-Conductor Inline Coupler. Connect the phone cords in such a way, they lead to the main jack you will be using.
Step 3: Plugging in the Phone Lines
Take all of the phone lines that you are going to use and plug them into your adapter.
Step 4: Plugging the Adapter In
Now take the adapter with all the phone lines in it, and plug it into the port on the recorder control.
Step 5: Plug the Recorder Control In
All you have to do is plug the cord coming from the control into the phone jack. While plugging it in, set the switch to record.
Step 6: Plug the REM and Microphone Cords In
Plug the REM and microphone cords in. They are different sizes, so you should be able to figure out which one's which. The smaller one is the REM cord.
Step 7: Test It Out
After you are done plugging everything in, and running the wires how you want them, put a tape in and test it out. If you did everything right, the recorder should start recording when you pick up or turn on the phone.
Step 8: Tips
Here are some tips:
1)Buy a silent tape recorder if you have to buy one. Ask the clerk how loud it is.
2)Hide the tape recorder; put it somewhere it can't be seen.
Hope you enjoyed this, as it was my first instructable.