The Linksys WRP400 is a wireless router with an integrated phone adapter. It supports both wired and wireless connections, with four Ethernet ports for wired devices and 802.11b/g/n Wi-Fi for wireless devices. The phone adapter allows for VoIP calling, with support for two lines and three-way conferencing. The router also features advanced security options, including a built-in firewall and VPN pass-through.

The WRP400 is a router manufactured by the company Linksys that allows multiple devices to connect to a network and communicate with each other. It works by receiving data packets from devices and forwarding them to their intended destination. The router is assigned a unique IP address , which serves as its identifier on the network.

To access the router's settings and configure its functions, users can log in using a web browser and their and . Once logged in, users can customize various settings such as network name, password, and security protocols. They can also set up parental controls, prioritize bandwidth usage, and monitor network activity.