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@paul_ipv6 @VickForcella @SteveBellovin @inthehands

Believe it or not, there were person-sized kiosks every block or so containing large books of telephone users in the local geographic area, with a unique seven-digit code for each user. (One of these books, printed on yellow paper, had a section for "photographers".)

Also in the booth was a coin-operated device, connected by wire to a central office, that allowed two-way voice communication with the person associated with each code number.