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5 Written questions

4 Multiple choice questions

  1. A cell is an area covered by a cellsite with antenna and equipment to serve mobile phones in the cell. The MTSO coordinates activity among the cellsites. It connects wired customers via a POP.
  2. Converts digital computer signals to analog and sent over telephone lines. 3G is for sending data faster with a speed 2-3 Mbps. WiMAX is to replace DSL, Cable and cellular service with 1-4 Mbps. Satellite is very expensive because of long transmission distance. Two way data transmission is expensive. Some carriers are pushing fiber directly to the home with 100 Mbps or more.
  3. ADSL uses 1 VG UTP lines. Cable uses optical fiber to the neighborhood with thick coaxal cables. Thin coaxial drop cables go to the residences.
  4. Voice Over IP. The gateway translates between the signaling technology and transport technology.A codec is required. UDP and SIP

4 True/False questions

  1. Define circuit switching and compare with packet switchingADSL uses 1 VG UTP lines. Cable uses optical fiber to the neighborhood with thick coaxal cables. Thin coaxial drop cables go to the residences.

          

  2. Compare voice and data traffic; How are circuit switching and packet switching used with voice and data traffic? Why?Circuit is an end-to-end connection between two subscribers. Capacity is reserved on all trunk lines and switches.

          

  3. What is pulse code modulation? When is it used?1-pair Voice Grade UTP, 2-pair data-grade UTP, and optical fiber

          

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

          

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