ET200X Gateway is an open source asterisk-based VoIP Gateway solution for operators and call centers. It is a converged media gateway product. With user friendly GUI, customers may easily setup their customized Gateway. Also secondary development can be completed through AMI (Asterisk Management Interface). ‘L’ means that the device has no hardware codec V100 module. The ET200X Gateway Helps 1/2/4 software-selectable T1/E1/PRI interface and Helps up to 30/60/120 concurrent calls.