DoorKing 1830-185 TCP/IP Adapter Manual Setup Kit. 

Features

• Manual setup, determine Default Gateway, set IP address, setup Port Forwarding, configure Firewall for access, order Static IP address from internet provider or setup DDNS host account
• Compatible with most VoIP providers
• Requires a network (internet) connection at the system distance limitation on network wiring do apply
• Use your own VoIP service and the DKS data only option for programming
• Provides TCP/IP Network Connection