Connecting to a telephone line

[srobertjames]

I'd like to connect my breadboard circuit to a telephone line. I know telephone lines run 40-100V, and so I need some type of interface. I've found Telephone Line Interface Modules (DAA's) , but, it still needs some equipment on the phone end - an RJ11 connection, ferrite beads, voltage suppression.

Is there any simple end-to-end interface to the phone line that will give me an Rj11 connection on one end, and let me have access to the audio on the other?

 

[MrAl]

Hi,

You can use a 10k resistor in series with a 0.1uf 200v capacitor, one set in series with each line.
The legal way i think is to use a transformer with a series cap on the line side.

 

[Externet]

If you want to work only with audio, use any audio output transformer with its 8 ohm winding in series to only one wire of the telco pair.
Then, inject/extract audio at the other winding.