Found this pic today. Wow 18 years ago! There were only 100 900 numbers allocated for the entire US. We had 2 of them.
To the far right, an original IBM PC running DOS with the first digital audio cards developed for the new audiotext industry.
All the recorded phone sex fantasy messages were stored on the IBM PC then sent digitally to AT&T's NOC through the black boxes to the right of the PC, and then they were broadcast on AT&T's nationwide 900 pay-per-call network.
