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What Is ISDN?
Part 1 of Paper
....s which has been in the works for over a decade. This
system allows audio, video, and text data to be transmitted simultaneously
across the world using end-to-end digital connectivity.
The original telephone system used analog signals to transmit a signal across
telephone wires. The voice was carried by modulating an e.... Part 2 of Paper
.... a limit to the amount of information that a common analog
telephone line can hold. Currently, it is about 28.8 kbit/s. [Hopkins] ISDN
allows multiple digital channels to be operated simultaneously through the same
regular phone jack in a home or office. The change comes about when the
telephone company's switches are upgraded to handle digital calls. Therefore,
the same wiring can be used, but a different signal is transmitted across the
line. [Hopkins] Previously, it was necessary to have a ph.... |
| Number of words: 5167 - Approximate pages: 19 |
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