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Asymmetric Digital Subscriber Line

A technology that allows more data to be sent over existing copper telephone lines (POTS (Plain Old Telephone Service)). ADSL supports data rates of from 1.5Mbps to 9Mbps when receiving data (known as the downstream rate) and from 16Kbps to 640Kbps when sending data (known as the upstream rate). ADSL requires a special modem.

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