Trunk Gateway design based on Soft-switch VoIP system

A kind of Trunk Gateway is designed to implement the communication between LAN and PSTN, which is based on the advantages of Soft-switch, on the basis of existed VoIP system, establishing the hardware platform by DSP and CPLD, using MGCP as the communication protocol between MG and MGC. This Trunk Gateway, which is applicable to many types of entertainment, possesses strong practicability for the low cost, simple operation, easy maintenance.