OpenVox T1/E1 Gateway with open source Asterisk-based VoIP Gateway solution is an operators and call centers. It is a converged media gateway product. This type of gateway connects traditional phone system to IP networks and integrates VoIP PBX and ISDN seamlessly. With user friendly GUI, user may easily setup their customized Gateway. Also secondary development can be completed through AMI (Asterisk Management Interface). The DGW-100X(R) digital VoIP gateway helps1/2/4 software-selectable T1/E1/PRI interface and helps up to 30/60/120 concurrent calls. The "R" means that the device helps redundant power supply.