Yeastar TG is a series of VoIP GSM/ UMTS gateway connecting GSM/ UMTS Network to VoIP Network directly, which can support two-way communication: GSM/UMTS to VoIP or VoIP to GSM/ UMTS. It is the best solution ever to connect IP-based telephone systems, and softswitches to GSM/ UMTS network; and also the best fallback solution when landline goes down. Benefits - Cost saving Save phone bills tremendously with mobile-to-mobile calls and SIP trunks - Back up Work as a cost-effective backup when the landline network goes down - Easy to install Everything can be easily set up in the Web based management interface - Easy to integrate High compatibility with major IP-PBX and softswitch brands