Q:

How does ISDN work?

A:

Quick Answer

According to Michiel Van Kets, Integrated Services Digital Network is designed to allow digital voice and data transmission over copper telephone wires. It provides improved voice quality and both circuit-switched and packet-switched technologies for voice and data. Although it is still available in the United States and Europe through telephone companies, cable modems and even wireless broadband provide better throughput speeds and are more popular as of 2014.

 Know More

Full Answer

Integrated Services Digital Network is able to provide throughput speeds of 128 Kbps. It doubled the speed of 56K telephone modems and is a more affordable alternative to other types of Internet access as of 2014. According to SearchEnterpriseWAN, service includes B-channels, or bearer channels, to carry data, voice and other services, and D-channels, which are signaling channels, to carry control and signaling information. Integrated Services Digital Network offers two levels of service: Basic Rate Interface for use in homes and small businesses with two 64 kbps B-channels and one 16 kbps D-channel providing up to 128 kbps; and Primary Rate Interface for heavy commercial and educational uses built on 23 B-channels and one 64 Kpbs D-channel in the United States and 30 64 kbps B-channels and one 64 kbps D-channel in Europe. In telephony, Integrated Services Digital Network is a smart-network technology that can add new services to the public switched telephone network, while it is used in the broadcast industry for switching high-quality, low-latency audio circuits.

Learn more about Computers & Hardware

Related Questions

  • Q:

    What is the difference between ISDN and DSL?

    A:

    IIntegrated Services Digital Network, or ISDN, is a dial-up connection carried over specially installed lines, while digital subscriber line, or DSL, is an always-on connection that does not need to dial over the lines that it uses. ISDN and DSL work over the same kind of network, but the main difference is that the ISDN has to actually dial out to achieve a connection for data to flow through. DSL does not need to dial out, and as a result, the user can make calls while connected to the Internet.

    Full Answer >
  • Q:

    What are the advantages of pulse-amplitude modulation?

    A:

    Pulse-amplitude modulation allows data to be transmitted more efficiently, more quickly and in greater volume using conventional copper wires. The available frequency modulations are infinite, so PAM formulas can be continually developed to allow increasing data throughput over existing networks. PAM is also the simplest form of modulation.

    Full Answer >
    Filed Under:
  • Q:

    How do POS terminals work?

    A:

    POS, or Point of sale, terminals capture real-time data on purchase transactions and generate estimates of product sales and market share. POS systems can track and record customer purchases and orders, process debit and credit cards, manage inventory and connect with other POS terminals via a network.

    Full Answer >
  • Q:

    How do SATA cables work?

    A:

    Serial advanced technology attachments (SATA) work by transmitting data between a motherboard and hard drives through a seven-pin cable that sends information twice as fast as previous technology, according to About.com. A single high-speed serial wire now inhabits most computer systems instead of a parallel bus system that incorporated 40-pin wires or 80-pin wires.

    Full Answer >

Explore