VoIP stands for Voice over Internet Protocol. By using a VoIP Telephones and VoIP technology you can effectively use the internet to make phone calls. VoIP does this by placing the voice calls on network which encrypts the voice in data packets at one end and encrypts it in voice calls at the other end. In VoIP, encryption and decryption is from a analog signal (i.e. your voice call) into digital signal (data packets) and again into the analog signal.
You can make VOIP calls by a regular phone with VOIP adapter or even from your computer using a simple microphone. VoIP applications can generally be used with a simple microphone and computer speakers, but IP telephones or VoIP boxes can also be used, providing an experience identical to normal telephoning. Many VOIP manufacturers are designing phones which are specially meant to work with this technology, called SIP phone, and now extensively used by growing VoIP users.
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