This document is the user manual for the D-Link DIR-457/DIR-457U. It introduces the features and characteristics of the device, as well as how to install and use it.
This manual covers the DIR-457/DIR-457U router’s hardware overview, package contents, system requirements, and detailed installation steps. It explains how to configure the device for Wi‑Fi, 3G modem mode, and advanced network features such as firewall, port forwarding, and VPN passthrough.
Additional sections describe SIM and battery installation, power management, connection setup for Windows and mobile devices, profile and SMS management, firmware updates, and regulatory compliance information (FCC, CE). Technical specifications and troubleshooting tips are also included.
The router provides up to 54 Mbps wireless connection with 802.11g clients.