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Q.

What is ISDN in computer networking ?

Asked by Ajay Kumar, 13 Jun '08 11:10 am
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Answers (2)

 
1.

Integrated Services Digital Network or Isolated Subscriber Digital Network (ISDN), originally "Integriertes Sprach- und Datennetz" (German for "Integrated Speech and Data Net"), is a circuit-switched telephone network system, designed to allow digital transmission of voice and data over ordinary telephone copper wires, resulting in better voice quality than an analog phone. It offers circuit-switched connections (for either voice or data) in increments of 64 kbit/s. Another major use case is Internet access, where ISDN typically provides a maximum of 128 kbit/s (which can be considered to be broadband speed, since it exceeds the narrowband speeds of 56k telephone lines). More broadly, ISDN is a set of protocols for establishing and breaking circuit switched connections, and for advanced call features for the user. It was introduced in the late 1980s.[1]

In a videoconference, ISDN provides simultaneous voice, video, and text transmission between individual des ...more
Answered by prashant mishra, 13 Jun '08 11:14 am

 
  
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World Wide Webside
Answered by rabin chakraborty, 13 Jun '08 11:11 am

 
  
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