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MULTIPLEXING APPLICATION

MULTIPLEXING APPLICATION. The Telephone System. Telephone Network. Analog Switched Service. Analog Leased Service. Analog Hierarchy. Analog vs Digital. Noise immunity Noise is analog Cost Digital: 2 signals Analog: continuous range of signal. Switched/56 Service.

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MULTIPLEXING APPLICATION

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  1. MULTIPLEXING APPLICATION The Telephone System

  2. Telephone Network

  3. Analog Switched Service

  4. Analog Leased Service

  5. Analog Hierarchy

  6. Analog vs Digital • Noise immunity • Noise is analog • Cost • Digital: 2 signals • Analog: continuous range of signal

  7. Switched/56 Service • Digital Service Unit (DSU) – changes the rate of data to 56 kbps • encodes the data in the format used by the service provider • More expensive than modem • Has better speed, quality less susceptible to noise

  8. Digital data service-DDS Maximum data rate – 64kbps

  9. Digital signal (DS) Hierarchy

  10. DS Hierarchy • DS – 0 • Single digital channel – 64kbps • DS – 1 • 24 * 64 kbps + 8 kbps overhead = 1.544Mbps • Or any combination that can fit within 1.544Mbps • DS – 2 • 96 * 64 kbps + 168 kbps overhead = 6.312 Mbps • DS – 3 • 672 * 64 kbps + 1.368 Mbps overhead = 44.376 Mbps • DS – 4 • 4032 * 64 kbps + 16.128 Mbps overhead = 274.176 Mbps

  11. T-1 Line

  12. T-1 Frame

  13. Fractional T-1 Line Digital Service Unit/Channel Service unit

  14. DS & T Line Rates

  15. E Line Rates

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