16-ports FXS modular Gateway, 1 10/100M LAN, 1 10/100M WAN, 1 open slot, QoS, DHCP Server, NAT, Dynamic DNS, Support Call Control Protocol SIP, Call features support, IP Routing, RIP v1, RIP v2, MAC Filtering, IP Filtering, Web-configuration, Telnet, CLI, TFTP, SNMP support, 2 cables for TELCO-50 ports