this post was submitted on 18 May 2025
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Microblog Memes

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[โ€“] nonentity@sh.itjust.works 16 points 1 day ago (1 children)

SMS was never intended to be available to end users. It was built as a side channel to help field techs with diagnostics. When consumer handsets started to add features, it was co-opted to provide what we know it as today.

[โ€“] Aceticon@lemmy.dbzer0.com 4 points 19 hours ago

That explains why way back when I tried to read the GSM (1.x) specification out of curiosity, it turned out SMS were going via a "control channel".

Always wondered why the data for those was going via a control channel rather than some kind of data channel.