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[–] 17 points 1 year ago (1 child)

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.

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  • [–] 4 points 1 year 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.

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