That's how SMS works. It's running a baseband modem over the voice channel. | Hacker News

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		kevin_thibedeau on June 29, 2022 \| parent \| context \| favorite \| on: Mastercard and visa are the de facto regulators of... That's how SMS works. It's running a baseband modem over the voice channel.

lxgr on June 29, 2022 [–]

SMS is transmitted over digital signaling or transport channels. There was never any analog coding involved (except for a few retrofitted implementations on landlines in Europe).

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