DC voltage of the phone line is blocked by capacitor. AC voltage in phone line is between mic and line level. So, regular tape recorder should be fine.
Thank you, Another question now, where do I connect the "remote control" thing ? I looked on my tape recorder and I didn't see anything about "control".
remote control is usually a button on the mic. Some tape recorders have this function and a special jack close to mic jack. Usually small recorders, intended for speech recording.
Hello all: How are you? I have just one problem and I trust you to help me solving it. I want to record all the phone calls (outgoing and incoming) automatically when I am not home. Is there any way to do this without anyone could know or feel that there is strange equipment installed? I preferred software and use the computer but I guess making such a simple circuit like this is great idea. I am mechanical engineer but I will teach my self doing it thanks to your tip. Forgive me for asking too much as I am not prof in this matter. Thanks in advance. Have a wonderful day. Regards.
Thanks sir for the fast reply and great info but I still have one question. What is the remote control jack? I will connect the two wires to the phone line and the other one to the recorder so, what is the last one? I mean that I got the parts from the shop and i will try to do it by my self (God helps me) (excuse me, I am mechanical engineer and this is the first time to make a electric circuit) but I still do not know where to plug the remote control jack to. Is this the tap adaptor circuit? I see many of then in the net about 35 $. Thanks very much for assistance. You are such a great help. Waiting for your reply.
The remote jack is the jack on the tape recorder that allows you to externally switch it on and off for recording. Not every recorder has this, but most older dedicated recorders do.