... gateway. Products:The SinoV-X500 is an analog GSM/CDMA/WCDMA Cellular VoIP Gateway that helps directly interconnect a SIP-supporting ... VoIP network with GSM/CDMA/WCDMA networks. Function:1,Support 4/8 Channels 850/900/1800 ... 800/1900MHz Dual-band CDMA, 850/900/1800/1900/2100MHz WCDMA Cellular Network2,SMS receiving/batch sending, AT command compatible3,Support ...