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Fundamental Concepts of SIP Harrisburg

Session Initiation Protocol (SIP) refers to a new signaling, presence and instant messaging (IM) protocol created for the purpose of setting up, modifying and tearing down multimedia sessions, requesting and delivering instant and present messages over the Internet....

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3 reasons why you should use calling cards

The introduction of the telephone billing options has helped individuals to pay the bills in a convenient manner. Consumers now no more need to carry consumer calling cards. Similarly, mobile phones have reduced the dependency on the consumer calling cards. However,...

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