How does ISDN work?


ISDN allows data to be established and transmitted around the world using end-to-end digital connectivity. With ISDN, voice and data are carried by 64Kbps bearer channels (B channels). Common ISDN installations can easily be configured to use two B channels, providing a true data rate of 128Kbps. In all ISDN installations, a data channel (D channel) handles control signalling at 16 kbps or 64 kbps, depending on the service type.
1 Additional Answer
ISDN technology normally by accessing the Internet through fibre optic telephone connections to send data, voice and video over digital telephone lines. An ISDN line is a digital line when the computer connects to the ISDN line (via a terminal adaptor) without having to convert the data into sound first. While speeds may vary based on location and provider.
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