Introduction：MTG3000 is a carrier grade VoIP gateway, which is designed for telecom operators, ITSPs with high reliability and performance.It adopts STM-1 interface which features high integration and large capacity MTG3000 is a carrier grade VoIP gateway, which is designed for telecom operators, ITSPs with high reliability and performance. Focusing on a concept of maintainable, manageable and operable, MTG3000 adopts STM-1 interface which features high integration and large capacity. It provides carrier-grade VoIP and FoIP services, as well as value-added functions such as modem and voice recognition. Thus it constructs a flexible, high-efficient, future-oriented communication network for users. MTG3000 supports a range of signaling protocols, realizing the interconnection between SIP and traditional signals like SS7 and PRI. It supports multiple codec methods, offers signal encryption technology and smart voice recognition technology, and improves the utilizing efficiency of trucking resources while ensuring voice quality. The trunk gateway is ideally fit for various networks of ITSPs, telecom operators and large-scale enterprises. Physical Interfaces: SDH Interfaces 2* Standard LC SDH, 155M 1+1 Redundancy Channels Protection Master/Slave Clock Source Main Control Unit(MCU) 1+1 Redundancy, Hot Plug Digital Processing Unit (DTU) 4* DTU Maximum Support 512 Voice Channels Each Board Ethernet Interface GE1: 10/100/1000 BaseT Adaptive Ethernet GE0: 10/100/1000 BaseT Adaptive Ethernet Serial Port 1* RS232, 115200bps  Voice Capabilities: •Codecs:G.711a/μ law,G.723.1, G.729A/B, iLBC, AMR