Yeastar Tg 400 Gateway 4 Simcards

The yeastar tg400 is a 4-channel gsm voip gateway that bridges mobile networks (gsm/cdma/umts) with voip/sip telephony systems like ip pbxs, softswitches or sip phones. it lets you make and receive calls between gsm and voip networks, providing a cost-effective alternative to traditional phone lines and a backup trunk when fixed voip trunks fail. it supports up to four gsm sim cards for simultaneous calls, standard voip protocols (sip, iax2), and a variety of voice codecs for clear audio. you manage and configure the tg400 through a web-based interface, with features like call routing, least-cost routing (lcr), sms support, nat traversal, firewall, vpn and security (tls/srtp). its single lan port connects to your network, and it’s ideal for small to medium business voice integration with mobile networks.