Remember (which is older) the phones-automats, the same taxis that stood on the streets in buckets and under boxes? Where there were no mobile phones, they sometimes earned quite cool: you throw a coin (dry a phone card) and call. For some time, these phones were free. My future wife did not have a home phone, the poet went to the crossroads and called me from such a street house. The conversation was very long :)
As for these automatic phones, as it turned out, so you can call :) Yes, each of them had their city number (which is quite logical, but nobody thought about it!) is
It was discovered by chance, where I, walking with my wife, passed by that same apparatus. Think about pre-marriage romance. The wife picked up a mobile phone number, and a taxi number appeared on the screen. And then I decided to call back :) Give me a call. No, the call did not go, but when the wife took the telephone, the connection was established and we "talked."
The usual, entirely domestic "discovery" for some reason capitalized in the memory, as something surprising and unusual :)