Wireless LAN Basics, Radio Transmission, Range

DSL-G624T Wireless A DSL Router User’s Guide

Wireless LAN Basics

Some basic understanding of 802.11b/g wireless technology and terminology is useful when you are setting up the Router or any wireless access point. If you are not familiar with wireless networks please take a few minutes to learn the basics.

Radio Transmission

Wireless LAN or WLAN devices use electromagnetic waves within a broad, unlicensed range of the radio spectrum to transmit and receive radio signals. When a wireless access point is present, it becomes a base station for the WLAN nodes in its broadcast range. WLAN nodes transmit digital data using FM (frequency modulation) radio signals. WLAN devices generate a carrier wave and modulate this signal using various techniques. Digital data is superimposed onto the carrier signal. This radio signal carries data to WLAN devices within range of the transmitting device. The antennae of WLAN devices listen for and receive the signal. The signal is demodulated and the transmitted data extracted. The transmission method used by the access point is called Direct Sequence Spread Spectrum (DSSS) and operates in a range of the radio spectrum between 2.4GHz and 2.5GHz for transmission. See the technical specifications for more details on wireless operation.

Range

Range should not be a problem in most homes or small offices. If you experience low or no signal strength in some areas, consider positioning the Router in a location between the WLAN devices that maintains a roughly equal straight- line distance to all devices that need to access the Router through the wireless interface. Adding more 802.11g access points to rooms where the signal is weak can improve signal strength. Read the section about placement of the Router titled Location in the next chapter, Hardware Installation, for more information.

SSID

Wireless networks use an SSID (Service Set Identifier) to allow wireless devices to roam within the range of the network. Wireless devices that wish to communicate with each other must use the same SSID. Several access points can be set up using the same SSID so that wireless stations can move from one location to another without losing connection to the wireless network.

The DSL-G624T operates in Infrastructure mode. It controls network access on the wireless interface in its broadcast area. It will allow access to the wireless network to devices using the correct SSID after a negotiation process takes place. By default he DSL-G624T broadcasts its SSID so that any wireless station in range can learn the SSID and ask permission to associate with it. Many wireless adapters are able to survey or scan the wireless environment for access points. An access point in Infrastructure mode allows wireless devices to survey that network and select an access point with which to associate. You may disable SSID broadcasting in the web manager’s wireless menu.

Wireless Security

Various security options are available on the DSL-G624T including open or WEP and WPA (including WPA-PSK). Authentication may use an open system or a shared key. For details on these methods and how to use them, please read the wireless LAN configuration information in chapters 3 (Basic Router Configuration) and 4 (Advanced Router Configuration) below.

DSL-G624T, D-Link Wireless ADSL Router specifications

The D-Link Wireless ADSL Router, DSL-G624T, is a versatile and powerful networking solution designed for home and small office environments. This router combines the functionality of ADSL modem capabilities with the convenience of wireless connectivity, making it an ideal choice for users looking to establish a reliable internet connection without the hassle of multiple devices.

One of the primary features of the DSL-G624T is its ADSL2+ support, which allows download speeds of up to 24 Mbps. This high-speed capability ensures that users can surf the web, stream videos, and engage in online gaming with minimal lag and buffering. The built-in ADSL modem means that users can connect directly to their ISP with no need for additional hardware, simplifying setup and reducing clutter.

In terms of wireless technology, the DSL-G624T supports the 802.11g Wi-Fi standard, which offers a maximum theoretical speed of 54 Mbps. This allows for a stable and speedy wireless connection throughout the home or office, supporting multiple users and devices simultaneously. The router also features Wireless Distribution System (WDS) functionality, enabling users to extend the wireless network easily by connecting additional routers or access points.

Security is a crucial aspect of any networking device, and the DSL-G624T does not disappoint. It includes advanced security features such as WPA/WPA2 encryption, ensuring that users' data remains safe from unauthorized access. Additionally, the router supports MAC address filtering and firewall protection, providing an additional layer of defense against potential threats.

The DSL-G624T is equipped with four 10/100 Mbps Ethernet ports, allowing users to connect wired devices such as desktop computers, gaming consoles, or network-attached storage directly to the router. This is particularly useful for systems that require stable connections, such as for gaming or streaming high-definition content.

Installation and management of the DSL-G624T is user-friendly, thanks to its web-based interface. Users can easily configure settings, manage connected devices, and monitor their network's performance. The provision of DHCP support and easy-to-follow wizards streamlines the setup process for users of all technical levels.

In conclusion, the D-Link Wireless ADSL Router, DSL-G624T, combines high-speed ADSL modem capabilities with robust wireless networking features. With its solid performance, essential security measures, and ease of use, this router is a fantastic choice for users looking to enhance their internet connectivity at home or in small office environments.