The service allows you finding out who has called you, when the telephone line was busy, switched off or was outside the zone of coverage. By doing so, it ensures that an important call will not be missed.
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.