A modem is a communications device which takes a digital signal from a computer and MODulates it into an analogue signal for transmission over the telephone network. The recipient modem DEModulates the analogue signal back to digital. Modems are an essential hardware device which permit wide area networking and remote access network activity. Advances in modem technology also delivered features such as encryption, dial-back, redial, error correction, data compression and recovery from signal interruptions.
Modems can also handle voice and fax traffic.
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