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ISDN is a digital telephone service that can transmit voice, data and control information over an existing single telephone line. What is the full form of ISDN?

ISDN is a digital telephone service that can transmit voice, data and control information over an existing single telephone line. What is the full form of ISDN? Correct Answer Integrated Services Digital Network

The correct answer is Integrated Services Digital Network.

Key Points

  • ISDN is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network.
  • This results in potentially better voice or data quality than an analog phone can provide.
  • It provides a packet-switched connection for data in increments of 64 kilobit/s.
  • It provided a maximum of 128 kbit/s bandwidth in both upstream and downstream directions.
  • A greater data rate was achieved through channel bonding.
  • It can integrate speech and data on the same lines, which were not available in the classic telephone system.

Additional Information

  • Advantages of ISDN:
    • ISDN channels have a reliable connection.
    • ISDN is used to facilitate the user with multiple digital channels. 
    • It has a faster data transfer rate.
  • Disadvantages of ISDN:
    • ISDN lines are costlier than the other telephone system.
    • It requires specialized digital devices.
    • It is less flexible.

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