... gateway,8 SIM card in, function like FXO+GSM FWT. VOIP+GSM gateway. IMEI change,VPN PPTP,Encryption.Quad band,GOIP 8 channels GSM VOIP gatwayGoIP8 GSM Gateway bridges the GSM ... to the LAN and an additional deviceGSM module for making GSM callsSpeech quality ensured by QoS at the Ethernet and IP ... Power, Ready, Status, WAN, PC, GSM Call forward from GSM to VoIP and VoIP to GSM Dial in mode or dial out ...