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WHAT IS VOIP?

1. Voice Over Internet Protocol (VoIP) is a new technology that uses broadband Internet and network lines to transmit real-time voice information. This technology has the potential for completely changing the way phone calls are made and making phone companies a thing of the past.

2. To make a phone call on the Internet, several things must happen. On the sending side, analog voice signals are digitized, compressed, divided into packets and transmitted over network lines. On the receiving end, the signals are recombined, uncompressed and converted back into audio. Because the voice signals are digital, they can be transmitted just like any other data packets on a network. VoIP can be relatively inexpensive to implement, although costs rise as the complexity of the system increases.

3. There are currently several problems with this technology. If the computer or network lines fail, then telephone service is interrupted. Though the stability of computer hardware, operating systems and network infrastructure has improved significantly in the last decade, crashes still occur. The "up" time of these systems is still significantly less than with traditional phone systems - which often continue to function even during power outages. Another issue is that tracking the origin of a call is difficult because the signals are transmitted over the Internet. This is especially important to emergency responders to 911 calls. Caller ID service may not function either.

4. Additionally, devices that make calls using phone lines, such as fax machines, cable TV boxes, etc. may not function properly. Law enforcement officials may have difficulty wiretapping phone lines that use VoIP technology. Finally, the quality of VoIP service is lower than that of a traditional phonesystem. Since the information is transmitted over network lines, VoIP phone calls may break up, hesitate, or cause words to be dropped. All of these issues are being addressed and their significance should be eliminated overtime.

28. Определите, является ли утверждение:

With VoIP technology it is easier to track the origin of a call.

· истинным;

· ложным; *

· в тексте нет информации.

 

29. Определите, является ли утверждение:

VoIP technology is a possible threat for telephone companies.

· истинным;

· ложным;

· в тексте нет информации. *

 

30. Определите, является ли утверждение:

VoIP is not a very expensive technology to implement.

· истинным; *

· ложным;

· в тексте нет информации.

 

31.Определите, является ли утверждение:

VoIP technology is especially popular among young people.

· истинным;

· ложным;

· в тексте нет информации. *

 

32. Укажите, какой части текста (1, 2, 3,4) соответствует следующая информация:

The stability of a VoIP call is one of the problems this technology faces. (3)

 

33. Укажите, какой части текста (1, 2, 3,4) соответствует следующая информация:

With VoIP technology voice signals are transmitted as data packets. (2)

 

34. Ответьте на вопрос:

What are the problems with VoIP technology?

· It is unstable and makes tracking the origin of a call very complicated. *

· It is extremely expensive and less stable than traditional phone calls.

· To use VoIP the broadband Internet and network lines are needed.

· Voice signals are digitized to be transmitted over the Internet Protocol.

 







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