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Voip

Voice over Internet Protocol
Before we begin our discussion on transporting voice over a data networks, it is important to understand the concept and terms associated with a traditional telephone network. One of the most common piece of telecommunication equipment used today is the telephone. When you plug an ordinary analog telephone into the wall jack installed by the local telephone company, you are connected to the telephone network and are able to place calls. 1), but how is this process performed?
In early telephone networks, call completion was dependent on an operator to complete the calls. When you wanted to place a call you would pick up the receiver and be connected to an operator at the Central Office (CO). The CO is the local telephone office which all local lines connect too and where circuit switching of subscriber lines occurs. The operator would determine which two lines need to be connected for the parties to talk and connect the lines. To connect the two lines......


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Approximate Word Count: 3156
Approximate Pages: 13 (250 words per double-spaced page)

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