OpenVox WGW1002G is an industry 1st open source asterisk-based GSM VoIP Gateway solution for SMBs. It supports 2 SIM cards with hot-swap. Also secondary development can be completed through AMI (Asterisk Management Interface).
GSM Module 4-channel for VS-GW1600 V2
WCDMA Module 4-channel for VS-GW1600 V2
FXO/FXS/GSM/WCDMA Gateway solution for SMBs and SOHOs. With friendly GUI and unique modular design, users may easily setup their customized Gateway. Also secondary development can be completed through AMI.
GSM Module 4-channel for VS-GW1600-V1 and VS-GW1600-V2