Modem Buying Guide

A modem is a vital piece of equipment for anyone who wants to connect to the internet.

Here are some useful hints and tips about things to consider when choosing a modem.

How to Choose a Modem: Introduction

The modem is an essential tool for sending and receiving data between computers, and works by converting the digital data into an analogue signal so it can be carried over the telephone line, and then converting it back into digital data so it can be read by the computer - which is essential for using the internet.

The design of the modem determines the speed at which data can be sent. Until recently modems were often slow, and were unsuitable for many internet activities such as watching movies or downloading music.

Today's modems are capable of loading and uploading data at high speeds - usually referred to as broadband - with many models of modem now offering Wi-Fi or wireless connectivity.

There is a range of modems available to suit most needs.

What Type of Modem Do I Need?

Although each type of modem will essentially do the same thing - send and receive information via a telephone line - there are a variety of modem designs, each with a different range of functions. The best type for you depends on how you prefer to access the internet and how you set up your computer and modem equipment.

Here are the main types of modem:

ADSL router: An ADSL (Asymmetric Digital Subscriber Line) router is a very fast modem that enables broadband internet access via a home telephone line. ADSL routers are usually sold separately to a computer, and are attached to the computer via an Ethernet connection. ADSL routers share the same DSL line as conventional telephone calls, and by using a filter to separate the two, you can use the telephone even when your computer is online. Download and upload speeds using an ADSL router are many times faster than dial-up, making it easier to watch movies, download large files and listen to online radio.
Wi-Fi: A Wi-Fi modem typically uses the ADSL system and transmits and receives data wirelessly around the house. The great advantage over conventional ADSL routers is that Wi-Fi modems do away with the need to use cables to connect your computer to the internet. You can also have more than one computer wirelessly connected to the Wi-Fi modem, and with the same high download speeds as conventional ADSL routers, you can work, play and shop online anywhere within range of the wireless signal. Some models of Wi-Fi modem allow you to send files wirelessly to printers, and even to play music wirelessly by transmitting a signal from the computer to your hi-fi.
Dial-up modem: A dial-up modem used to be the main way of connecting to the internet before the introduction of broadband. A dial-up modem usually has a download speed of 56 kilobits per second, and is designed according to the V.92 format. This type of modem can either be integrated with the computer or come as an accessory. A USB dial-up modem is conveniently small and easy to use, and can be plugged into a computer for internet access where broadband or Wi-Fi access is not available. Dial-up modems are slower than broadband modems, and prevent the use of the telephone when you are online. But when you have access to a telephone line and no broadband service, a dial-up modem is a convenient alternative.

You can also buy modems specially designed for a range of equipment, including mobile communications devices such as handheld computers and portable gaming systems. Not all modems will work with every device, so it's important to make sure that the modem you choose is compatible.

Do I Need to Buy an Extended Modem Warranty?

A warranty ensures your modem will be repaired or replaced if it develops a fault (under certain conditions). A reasonable warranty should be included when you buy a new modem. For more expensive modems you should consider paying a little more for an extended warranty.

It's a good idea to set a limit on the amount of money you are prepared to spend on a modem. By shopping around online and comparing prices between retailers you could save money on a modem. If you take advantage of special offers and discounts you could even get a better model of modem than your budget would normally allow.