I want to record my my phone callsbut get poor results using a device on
the line socket.

So I want to use the handset lead. There are four connectors in the
socket on the main phone.

What signals are these wires carrying and what circuit do I need to get
an audio-out signal to record the phone call?


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Retell sell these connector devices below for £20 and £40 (cheaper at
Farnell). I would rather build one. But how?

Record connector for telephone handsets (ref 156)
http://snipurl.com/r7bf

PC to telephone play and record connector (ref 157)
http://tinyurl.com/qq9nq