> Hello,
>
> I want to record a telephone call, and also have the possibility to feed
> the telephone from an own audio source through a connector, rather than
> just speaking into the handset.
>
> So, what I need is an adapter with a telephone handset connector in one
> end, and two audio connectors (3,5 mm or whatever) in the other end -
> one out (that I can connect to a recording device) and one in (that I
> can feed with my audio signal).
>
> I have seen a lot of adapters connecting to the telephone handset
> connector giving an audio-out connector; but I need something where I
> can also provide the signal that is sent to the phone (and to the person
> I am talking to).
>
> Thanks in advance.
Since you speak about the handset, be advised that one used to put a handset into a pair of muffs that was a part of a 110 baud or 300 baud modem - it was a way of getting around the direct connection restrictions that Ma Bell had at the time (1980s). There was a speaker (or similar) on one end used to generate sound, and a microphone on the other end to pickup sound. So much time has elapsed since those daze, it would be a challenge to find one of those old modems. OTOH, many phones still have a transformer inside for "sidetone" coupling of the two signals. So one can use a coil pickup for listening to conversations; some experimentation is in order to find the most sensitive position for pickup. It might be possible to use the same coil for transmitting signals to the phone; i have not tried that. These are the two possible ways to allow what you have in mind. Just do not record conversations; there are some fairly stiff federal regulations.....