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Table Of Contents  CertiGuide to Network+
 9  Chapter 0111: Wide Area Networking
      9  III  Individual Dial Up Remote Access

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BRI ISDN
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ISDN

ISDN (Integrated Digital Subscriber Network) is an offering from some phone companies that is a circuit switched digital network created to offer more data throughput than is possible than with the original phone system.

A digital connection does not need to first convert the data to analog for sending, and is more reliable. ISDN lines require power at the client side, and do not have a dial tone. Connections are made very quickly compared to analog lines. The NETWORK+ test tests for knowledge on two different types of ISDN lines. They are the Basic Rate Interface and the Primary Rate Interface.


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