5 Written questions
4 Multiple choice questions
- 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.
- DAC is Digital to Analog Conversion where as ADV is Analog to Digital conversion.
- Analog is electrical signals made from pressure waves.Digital is either on or off.
4 True/False questions
What is pulse code modulation? When is it used? → 1-pair Voice Grade UTP, 2-pair data-grade UTP, and optical fiber
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.
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.
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.