Configurations
of GSM/VoIP networks allow the service providers to avoid the local Wired
Public Switched Network (PSTN) in communication with a GMS mobile handset. As a
result, the high rates charged by telephone companies are avoided.
Introduction
In business, communication is essential. Without the ability to speak with the exact person you need to at any given time, how could business get done? This is one of the reasons why the idea of a PBX system is so popular among businesses around the world—without it, communication is between employees and clients could potentially be hindered.