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5 Written questions

4 Multiple choice questions

  1. Analog is electrical signals made from pressure waves.Digital is either on or off.
  2. Pulse code modulation is the signal being sampled 8,000 times per second. Each sample is 1/8000 of a second. Each sample period, the amplitude of the signal is sampled. Each filter can distinguish 256 loudness levels.Produces 8 bits per sample.
  3. Circuit is an end-to-end connection between two subscribers. Capacity is reserved on all trunk lines and switches.
  4. 1-pair Voice Grade UTP, 2-pair data-grade UTP, and optical fiber

4 True/False questions

  1. Define telephone modem, DSL, cable modem, 3G cellular, WiMax, Satellite Internet, broadband on power lines, and fiber-to-the-homeCircuit is an end-to-end connection between two subscribers. Capacity is reserved on all trunk lines and switches.

          

  2. Compare GSM and CDMA. Where are they dominant? What advantage does CDMA have in terms of channel usage?Analog is electrical signals made from pressure waves.Digital is either on or off.

          

  3. What is the thrust of Nyquist's formula? (Sampling rate should be twice the bandwidth)---

          

  4. Compare DSL and cable optionsADSL uses 1 VG UTP lines. Cable uses optical fiber to the neighborhood with thick coaxal cables. Thin coaxial drop cables go to the residences.

          

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