Recording of telephone conversations

Sometimes it is useful to record telephone conversations. The easiest way is to go to a shop and buy a telephone conversation recording adapter which is connected between telephone line and the tape recorder. Those recording adapters are usually connected between telephone line and the telephone, but there are also other type available.
The adapter has two functions: it connects the audio from telephone line to recorder input at correct leveal and it isolates the recorder electrically from telephone line. The isolation is very important part of the adapter, because connecting tape recorder directly to the telephone line is against telephone regulations, causes all kinds of noises to telephone line and will damage your recorder. Some adapters have also tape recorder controlling function enabling recorder to start automatically when phone is picked up and stop when phone conversation ends.