The Yeastar TG400 4‑Port GSM VoIP Gateway is engineered for enterprises and service providers seeking seamless integration of mobile networks with VoIP infrastructure. It supports four SIM cards, enabling flexible routing, inbound/outbound calls, and SMS communication through a user-friendly web interface. The TG400 offers least-cost routing, SIM load balancing, and mobile network fallback, making it ideal for cost-efficient mobile termination and enhanced connectivity in areas where mobile voice is a priority.

Key Features:

• 4 GSM/3G/4G channels for simultaneous voice and SMS operations

• Dual-protocol support: SIP and IAX2 for compatibility across PBX systems

• Two‑way SMS support via web GUI or API integration

• Advanced call control: Least-cost routing, channel pooling, and auto-failover

• Secure communication with TLS/SRTP encryption and IP filtering

• Easy deployment with plug-and-play SIM setup and intuitive web config

• Compact, desktop-size design with Ethernet port and 12V DC power input