GSM/3G/4G VoIP Gateway
  • Support 4/8/16/32 GSM/WCDMA/CDMA/UMTS/LTE Protocols

  • Superior Voice Quality by Designated DSP Chipsets

  • Support SMS and A Range of Mobile Applications

  • Integrated Gateway Plus Built-in SIM Bank

Synway SMG4000 VoIP gateway could be compliant with a variety of wireless/mobile protocols (2G/3G/4G), enabling interconnection between GSM/CDMA/UMTS/WCDMA/LTE network and VoIP network smoothly and safely. It is able to bridge wireless network with IP networks efficiently, regarding the high-demanding user requirements. 

GSM4000 adapts self-propelled SIM card slots, advanced built-in VoIP processors and wireless modules, and helps enterprises and SPs launch diverse cost-efficient and flexible Wireless-to-IP communication systems. SMG4000 could be applied to a range of systems, including remote billing and charge, Mobility PBX, PSTN backup lines, VoIP localization, SMS platform and more.


  • Highlights
  • Specifications
  • Resources


  • DSP-based Algorithm 

DSP-enabled voice optimization to assure crystal voice quality and maximize bandwidth efficiency; High-speed response and connectivity in the extreme network environments, with better run efficiency; Telco-grade reliability and continuous high performance in fully loaded capacity and in the long run;

  • High security

High security and privacy for users via automatic-exchange of different SIM cards and Networks. In specific environments, SMG4016/SMG4032(16/32 Ports) could use and activate multiple SIM cards circularly, improve system security, make full use of bandwidth, and increase ROI. 

  • Complete Protocols Range

Support standard SIP protocols, and could be used worldwide; Support both 2G/3G/4G wireless network (in different versions), including both GSM/CDMA/LTE and More

  • High Voice Optimization Capability

Adopt Synway’s homegrown voice optimization technologies to ensure crystal clear communication, including DSP-based 128mc echo cancellation

  • High Flexibility and Scalability

Could be configured from4, 8, 16 or 32 Ports of Wireless-to-IP transmission, and support a diversity of wireless networks in a single system

  • User-friendly GUI 

Easy-to-use service Web-based UI configuration and management tools could help accelerate service deployment and simplify platform management

  • High Interoperability with Terminals 

Compliant with all brands of terminal mobile devices and a complete range of SIP trunking worldwide, support auto-provision in complex network environment

  • Telco-Grade Reliability

Adopts telco-grade standards and components to design and manufacture, and certified and approved by most telecom operators worldwide