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dial-up services

An information service on demand. The term was popular when analog modems were the only way to connect to a remote system. See dial-up.


(1) To phone someone. See rotary dial.

(2) Using the switched telephone network to send data from a computer to a remote device. Using a modem, the computer's digital data are converted to analog signals in the same frequency range as human voice. At the other end, another modem converts the analog back to digital. For home users, dial-up was the first Internet access service available. It was followed by ISDN, cable and DSL. See modem and dial-up network.

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