Naw it was ten. Just look at the way the physical machine was built. The further you turned the dial with your finger, the more pulses you got. So you turn it past nine and you get ten. The mechanism had no idea that the face of it was labelled with a zero. I’ve been meaning to see if our phone-to-GV box will handle pulses. I’ll get back to you. But it was ten.
Let me know. I found converters online; but I want to try my old phone before I spend the money. Right now, it’s ‘stored’ in a very long-story, ridiculous place...