Yeastar TG400L LTE Gateway with 4 LTE Ports for VoIP and Mobile Network Integration

The Yeastar TG400 is a VoIP 4G gateway providing 4G LTE to VoIP connectivity for mid-sized businesses, with 4 independent 4G channels for mobile trunking directly to IP-PBX platforms or SIP environments. It is deployed to reduce telephony costs through 4G mobile-to-mobile trunking and as a voice backup solution when fixed-line or SIP connectivity is unavailable. Compared to the TG200, the TG400 adds a 4-in-1 antenna splitter for improved signal distribution across multiple channels.

The TG400 supports SIP and IAX2 protocols, TLS and SRTP secure transport, voice codecs G.711, G.722, G.726, G.729A, and ITU-T G.168 LEC echo cancellation. Mobile features include automatic and manual carrier selection, VoLTE support, SMS sending and receiving, bulk SMS, USSD, PIN management, and an open API for integrations. The device uses a single 10/100 Mbps Ethernet interface and shares the same 213×160×44 mm form factor as the TG200.

The TG400 integrates with most IP-PBX systems and softswitches on the market. Administration is web-based with support for OpenVPN, Firewall, VLAN, QoS/ToS, DDNS, configuration backup and restore, and firmware upgrades via HTTP/TFTP. Call routing supports incoming and outgoing routing rules, VoIP trunk groups, blacklists, AutoCLIP, call duration limits, and CDR logging.

The TG400 is suited for offices and businesses requiring up to 4 simultaneous mobile lines, organizations with IP telephony platforms needing a reliable voice backup channel, small call centers handling SMS traffic and mobile calls, and deployments where the integrated antenna splitter provides an advantage in environments with variable 4G signal coverage.