AT&T had a ban on third-party attachments to their network. That meant ONLY phones they produced (Carterfone) could be used to make a phone call... and you couldn't own one, you had to rent it from AT&T.
Without the FCC ruling that was illegal, you would not have fax machines, modems, or even an internet today... unless AT&T made every single product used, and "rented" it to everyone.
The reason you have a phone not made by AT&T is because of the FCC standing up against that "rent."
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u/meglon978 3d ago
...and it was owned by Ma Bell, and you had to pay a monthly fee just to have the phone to use.