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maybe sending dms across the fediverse
(lemmy.blahaj.zone)
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this post was submitted on 18 May 2025
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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.
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.