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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. Voice Over IP. The gateway translates between the signaling technology and transport technology.A codec is required. UDP and SIP
  3. 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.
  4. DAC is Digital to Analog Conversion where as ADV is Analog to Digital conversion.

4 True/False questions

  1. Compare voice and data traffic; How are circuit switching and packet switching used with voice and data traffic? Why?Voice traffice is fairly constant. Data traffice is short bursts with long silences. Circuit switching is not efficient with data.

          

  2. 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.

          

  3. Describe the general structure of the PSTN - local loop, transport core, trunk lineCustomer premises Equipment consists of telephones, wires, and other infrastructure on the customer premises. Most business have a PBX. It acts like switchboard. Local Loop- the access line to the customer. Transport-Carriage of voice during a conversation

          

  4. Define telephone modem, DSL, cable modem, 3G cellular, WiMax, Satellite Internet, broadband on power lines, and fiber-to-the-homeConverts 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.