[Graham G3ZVT]

Acoustic couplers are back...
...In the NHS (I kid you not).

I saw the practice nurse at our surgery and she did my ECG.
The machine produced an audio tone that was frequency modulated with the ECG waveform, which was digitally recorded by the machine, she than carried it over to her desk and plugged in an acoustic coupler, dialled a number and spoke to someone at a cardiology centre, then she (and I presume the person at the other end), placed their handsets into their respective couplers and she replayed the modulated tone, which sounded like SSTV or weather FAX.

My friend had the same a few weeks earlier at a different surgery, I didn't fully believe such quaint technology would be in use today until I experienced it myself.

If it's "KISS", and it works, perhaps I shouldn't knock it!