A cademic report
III. How does the industry work ?
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- After that, Huu Tri continued their presentation with "What
| III. How does the industry work ?
The phone works by connecting to the antenna when you turn on the phone. The phone will connect to the nearest antenna when you make a call, the antenna will receive the signal, convert the signal to select the channel and transmit the signal. • Three types of phone companies + International (IRCs) handle long-distance calls between coun- tries. Once, this was the exclusive domain of AT&T in the United States, but now there are dozens of options. + Long-distance(LATA)telephone calls made between area codes.Verizon, the "new" AT&T, and Sprint are the leaders, but there are hundreds of smaller long-distance companies. + Local telephone (LECs)service is the domain of the local exchange carriers There are four competitors with national cell phone networks. AT&T and Verizon are the largest with over 100 million customers each, followed by T-Mobile and Sprint (FCC, 2015). US Cellular, nTelos, and dozens of others are regional or local providers who own their networks. Another 50 are "virtual" cellular carriers, called mobile virtual network operators (MVNOs), like TracFone Wireless that don't have networks of their own but lease space from the major carriers and resell it. Cell phone manufacturers are part of the wireless picture, of course. Samsung and Apple are the world leaders in terms of market share. Because smartphones require software, supplying that software is becoming an important part of the wireless industry. the apps craze has also help a cottage industry of more than 100,000 independent developers After that, Huu Tri continued their presentation with "What problems/issues need to be discussed?" tải về 3.81 Mb. Chia sẻ với bạn bè của bạn:
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