The GXW400x FXS gateway series enables small and medium businesses to create integrated IP and PSTN telephony systems that efficiently manage communication costs. These analog FXS gateways feature 4 or 8 FXS ports for analog telephones, two 10/100 Mbps ports for connection to an IP network. The GXW400x also includes a built-in NAT router. Advanced telephony features, easy automated provisioning superb voice quality and a PSTN lifeline port allow the GXW400x series to be the ideal analog gateway solution for businesses.