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VoIP uses a packet-switched network rather than the circuit-switched voice transmission lines that are used by the traditional telephone networks. VoIP is really a great technology, but there are also few issues with its implementation. You require having high speed internet connections for VoIP. For the VoIP technology, firewalls frequently appear tricky, so to resolve this, people use SBC, Session Border Controllers.

There are many useful advantages of the VoIP technology as there are more new features with the VoIP. For the developers, VoIP is still a good open market. VoIP service is less expensive than the other traditional phone companies. Many users even make free phone calls with VoIP; they don’t have to pay the extra charges for the service. Users only have pay to the Internet service provider, so the usage of the VoIP appears to be free.