Digital Modem

Digital Modem is any type of modem used for synchronous transmission of data over circuit-switched digital lines.

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What is Digital Modem?

Any type of modem used for synchronous transmission of data over circuit-switched digital lines.

One example of a digital modem is an ISDN terminal adapter. Digital modems are not used for changing analog signals into digital signals because they operate on end-to-end digital services.

Instead, they use advanced digital modulation techniques for changing data frames from a network into a format suitable for transmission over a digital line such as an Integrated Services Digital Network (ISDN) line. They are basically data framing devices, rather than signal modulators.