GOIP 4 VoIP GSM Gateway GoIP bridges the GSM and the IP networks by enabling voice communications. It is installed on the Mobile SIM Card, you can register the GSM telephone on the VoIP Softswitch. it can be easily combined into the arbitrary number of channels of Large Gateway Group. Low price, perfect sound quality, and powerful function make GoIP GSM an inevitable choice for system integrators, traffic businesses, and soft switch manufacturers.
* GSM Carriers and Base Stations Optional
* Sending SMS / USSD via built-in webpage or SMS Server
* Remote SIM
* Auto balance check and recharge (prepaid SIM)
* Call time restrictions
* Remote Control Management
* Relay Server support for NAT and encryption of IP packets
* PPTP VPN and Relay Encryption
* Built-in SIP Proxy for peer-to-peer operation
* GSM Quad Band: 850/900/1800/1901 MHz
* Call forward from GSM to VoIP and VoIP to GSM
* Call Back
