ISDN, or Integrated Services Digital Network, is a digital, medium speed connection that's an alternative to the dial-up phone system because it can carry audio, video, telephone, and Internet traffic. ISDN is not new to the Internet, but it is gaining popularity among users because of its digital quality and speed. It is a three-line system, employing two B lines and one D line. Both B lines carry data at sixty-four thousand bits per second, much faster than modem dial-up connections. They can also be bonded together to create a single one hundred, twenty-eight bit per second. The D line is an administrative channel that does not carry traffic. ISDN requires special hardware to create a live link from the Internet provider to your computer. However, both the hardware and the ISDN services are relatively inexpensive. ISDN is an attractive alternative to a dedicated leased line or modem dial-up service. For more information on ISDN, please contact your local Internet service provider.
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