OpenVox DGW-L20X T1/E1 Gateway with open-source Asterisk-based VoIP Gateway solution is an operator and call center. It is a converged media gateway product. This type of gateway connects traditional phone systems to IP networks and smoothly incorporates VoIP PBX and ISDN. With a friendly GUI, users may easily set up their customized Gateway. Also, secondary development can be through AMI (Asterisk Management Interface). The DGW-L20X T1/E1 Gateway helps 1/2/4 software-selectable T1/E1/PRI interface manage up to 120 continuous calls.