Dial-Up Line


Definition of Dial-up Line in the Network Encyclopedia.

What is Dial-Up Line?

Dial-Up Line is any telecommunications link that is serviced by a modem. Dial-up lines are ordinary phone lines used for voice communication, while dedicated or leased lines are digital lines with dedicated circuits.

 Dial-Up Line connecting the modem to the internet
Dial-Up Line connecting the modem to the internet

Dial-up lines are generally much less expensive to use, but they have less available bandwidth.



Companies often use dial-up lines for occasional, low-bandwidth usage (such as remote access networking) or as a backup for more costly dedicated lines. Dial-up lines are shared with all subscribers in the Public Switched Telephone Network (PSTN) domain, while dedicated or leased lines are allocated solely to the subscriber’s private telecommunications domain.

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