VoIP stands for Voice over Internet Protocol. It is also known as Voice over IP or Internet Telephony in the various part of world. There is another technical term for VoIP and i.e. Hosted IP PBX.
With the help of Internet, VoIP telephony system permits you to make free and low cost national as well as international calls. The basic advantage of VoIP is that the system is not constructed on any particular device or network at receiver’s end. All you need is a VoIP supported phone and Internet.
VoIP overcomes the disadvantages of the old-style telephone system, which was unable to achieve previously. VoIP not only send and receives digital signal but also uses SIP and many more numerous functions e.g. IVR (interactive Voice recording), voicemail, voicemail to email, music on hold, call ring, call divert, call queue, call monitoring, call divert/forward, three way Audio conference and fax to email etc. Trying to achieve all