IS
IIRC when you phoned in it asked you 'How do you say one' etc. working through the numbers and commands. It was always a bit hit and miss at the learning, so you were usually better off just pressing the phone key so it learnt the DTMF tone. The learning process also meant you had spent about a pound before you got into the service properly.
That sounds familiar. Remember though that at the time DTMF tones weren't as universal as they are now (most push button phones such as the standard BT ones had tone/pulse switches so even if the phone could produce tones it wasn't necessarily turned on
IIRC when you phoned in it asked you 'How do you say one' etc. working through the numbers and commands. It was always a bit hit and miss at the learning, so you were usually better off just pressing the phone key so it learnt the DTMF tone. The learning process also meant you had spent about a pound before you got into the service properly.
That sounds familiar. Remember though that at the time DTMF tones weren't as universal as they are now (most push button phones such as the standard BT ones had tone/pulse switches so even if the phone could produce tones it wasn't necessarily turned on