Dial-up is still used for a lot of industrial uses as well. Have a few tanks of Diesel off away from any network infrastructure? Run a phone line to your ground

Dial-up is still used for a lot of industrial uses as well. Have a few tanks of Diesel off away from any network infrastructure? Run a phone line to your ground reader and dial into it from your SCADA software. Many ground readers have modems built in. Works great on military bases where they still use POTS.