OpenVox WGW1002G is an industry 1st open source asterisk-based GSMVoIP Gateway solution for SMBs. It supports 2 SIM cards with hot-swap.Also secondary development can be completed through AMI. The new WGW1002G GSM Gateway is born to fulfill our current product line and meet various needs from our vast customers. It is a small GSM gateway with hot-swap Design and only supports 2 port GSM interfaces, and it comes with the same functions as the Voxstack GSM gateways, developed for interconnecting a wide selection of codecs and signaling protocol, including G.711A, G.711U, G.729, G.722, G.723, G.726, GSM & SIP, to the GSM cellular networks to quickly reduce telecommunication expenses and maximize cost-savings.