The Trendnet TDM-C400 is a dual-mode ADSL2+ modem and router that offers high-speed Internet connectivity for homes and small businesses. It features four Ethernet ports, a USB 2.0 port, and wireless N technology for fast and secure wireless network access. The TDM-C400 also includes advanced firewall and security features, as well as support for IPv6 and Quality of Service (QoS) for prioritizing network traffic. Its compact and sleek design makes it easy to set up and integrate into any network.

The TDM-C400 is a router manufactured by the company Trendnet 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 192.168.1.254, 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.