It is a call which is made over internet protocol (VoIP). For example,
one can call using Google Voice to other recipient located miles away. Such
call can also be international.
Flexible commutator Softswitch is one of the main next-generation communications network NGN parameters and it is already a good alternative device to the systems management services in the traditional ATC calls both in price and functionality, and scalability, service quality, dimensions, and the use of energy and cost of technical exploitation.