Which of the following are ISDN interfaces?

A. Asymmetric DSL Interface (ADSLI)

B. Basic Rate Interface (BRI)

C. Ultra-Advanced Rate Interface (UARI)

D. Primary Rate Interface (PRI)

E. Broadband-ISDN (B-ISDN) & ATM

Choose the most appropriate answer from the options given below:

This question was previously asked in
UGC-NET Dec 2024 Library Science ( 16 Jan 2025)
View all MPPSC Librarian Papers >
  1. A, B and C only
  2. B, D and E only
  3. B, C and D only
  4. C, D and E only

Answer (Detailed Solution Below)

Option 2 : B, D and E only
Free
RPSC Librarian Grade II- Must Attempt Mini live Test
0.7 K Users
25 Questions 50 Marks 20 Mins

Detailed Solution

Download Solution PDF

The correct answer is B, D, and E only.

Key Points

  • ISDN (Integrated Services Digital Network) is a circuit-switched telephone network system that also provides access to packet-switched networks for digital transmission of voice and data, offering better quality than analog systems.
  • ISDN supports data transmission in increments of 64 kilobits per second (kbit/s) and can provide up to 128 kbit/s bandwidth in both upstream and downstream directions, achieved through channel bonding.

Types of ISDN Interfaces:

  • Basic Rate Interface (BRI): Includes two 64 Kbps B channels for data and one 16 Kbps D channel for signaling. BRI provides a total bandwidth of 144 Kbps (with overhead).
  • Primary Rate Interface (PRI): Offers 23 or 30 B channels (depending on the country), each 64 Kbps, and one D channel at 64 Kbps. PRI provides a bandwidth of 1.536 Mbps, with some overhead.
  • Broadband ISDN (B-ISDN): Relies on fiber optics and is designed to provide higher speeds than narrowband ISDN, using advanced technology for wider bandwidth services.

ISDN Services:

  • Bearer Services:
    • These services transfer information (voice, data, video) between users without altering the content.
    • The network simply transmits the data without processing it, falling within the first three layers of the OSI model.
    • Bearer services are defined in the ISDN standard and can operate using circuit-switched, packet-switched, frame-switched, or cell-switched networks.
  • Teleservices:
    • These services involve the network processing or changing the content of the data.
    • They correspond to OSI layers 4-7 and rely on bearer services.
    • Teleservices cater to complex user needs without requiring users to understand the details.
    • Examples include telephony, telefax, teletex, telex, videotex, and teleconferencing. However, these services are not yet standardized in ISDN.
  • Supplementary Services:
    • These services add extra functionality to bearer and teleservices, such as reverse charging, call waiting, and message handling—common in modern telephone services.

 

Latest MPPSC Librarian Updates

Last updated on Nov 25, 2024

-> MPPSC Librarian Result has been released for the exam which was conducted on 9th June 2024.

-> Madhya Pradesh Public Service Commission released the MPPSC Librarian notification.

-> As per the notification, a total of 255 vacancies were released. Below are a few key takeaways from the MPPSC Librarian notification. 

More Telecommunication & Wireless Communication Questions

More Information Technology Questions

Get Free Access Now
Hot Links: teen patti wealth teen patti mastar teen patti noble teen patti master old version teen patti game paisa wala