VoxStack series VoIP gateways are the innovative products from OpenVox. They are the industry FIRST Hot-Swap Asterisk-Based VoIP Gateways. VoxStack comes with OpenVox creative modular design that provides up to 5 plug-in VoIP gateway modules which could support combination of different telephony interfaces including GSM, WCDMA, FXS, BRI, E1/T1.

 The VoxStack series gateways are industry FIRST Asterisk-based gateways that support GSM/WCDMA/FXS interfaces. It provides full flexibility and maximizes the asterisk functions on the VoIP gateways.

The VoxStack VoIP gateways support up to 44GSM/WCDMA channels or 40 FXS ports or any combination of five GSM/FXS gateway modules at maximum.