VoIP gateways of the GXW series are designed for organizations of various sizes and allow you to save on the cost of implementing IP telephony by using traditional analog devices in the system. The GXW series includes both FXS and FXO gateways with the number of ports from 4 to 48. And when using the GXW4500 series in a VoIP network and PBX or with E1 / T1 channels, you can significantly increase the number of PSTN / ISDN trunks integrated into VoIP network.