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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. 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.
  3. Circuit is an end-to-end connection between two subscribers. Capacity is reserved on all trunk lines and switches.
  4. 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.

4 True/False questions

  1. What media are used for the local loop?1-pair Voice Grade UTP, 2-pair data-grade UTP, and optical fiber

          

  2. What is VoIP? What purpose does the VoIP gateway serve? What is required to be able to use VoIP? What layer-four protocol is used for VoIP?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. Compare DSL and cable optionsDAC is Digital to Analog Conversion where as ADV is Analog to Digital conversion.

          

  4. What is pulse code modulation? When is it used?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.