Openvox WGW1002G is small GSM gateway with hot-swap Design. This gateway supports 2 port GSM interfaces.The WGW1002G GSM Gateways use standard SIP protocol and compatible with Leading IMS/NGN platform, IPPBX and SIP servers, support most of the VoIP operating platforms such as Asterisk, Elastix, 3CX, FreeSWITCH ,Broadsoft etc.