Community QuestionSeen on 2 CBTsRe-created in 5 study sets this year
Integrated Service Digital Network (ISDN)
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Answer
An early international standard for sending voice and data over digital telephone wires. ISDN uses existing telephone circuits or higher-speed conditioned lines to get speeds of either 64 Kbps or 128 Kbps. the lines also have the ability to carry voice and data simultaneously over the circuit.