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 192.168.15.1, 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 admin and admin. 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.