Modems are used to transmit speech and fax transmissions over phone lines using analog signals. Modems translate the information passed over a phone line from a binary signal generated by a computer to an analog signal. This signal travels over the phone line and is translated back to a binary signal that can be read by a computer. Like standard modems, newer Integrated Services Digital Network (ISDN) and cable modems transmit digital signals instead of analog. Broadband technologies use waves similar to radio waves.

Modem servers are used to pool modems. With a modem server, the modem can be accessed across the network by multiple computers. The computers can use the modem to send fax transmissions or access the Internet. There are several steps to follow when setting up network modem servers:

1. Buy a modem for computer servers that is compatible with the operating system and server hardware.

2. Install and configure modem pooling software on the server.

3. Set up the clients to use the modem server.

Action Steps
The best contacts and resources to help you get it done

et the right modems for computer servers

The first step in setting up modem servers is to buy server modems. It's essential to get a modem that is compatible with your operating system. Check with Microsoft or your operating system provider for modem server information before making a purchase, then follow instructions for configuring and optimizing the modem.

I recommend: Microsoft TechNet gives instructions to help you install and configure a modem in Windows 2003. The WindowsServer catalog lists modems that are certified to work with Windows servers. Among compatible modems are models by USRobotics and Multi-Tech Systems Inc.

Use Microsoft software to set up computer modem servers

Windows Enterprise and BackOffice server versions have built-in remote access and modem sharing services that can be used to run a modem server, using either a standard, cable or Digital Subscriber Line (DSL) modem.

I recommend: WindowsNetworking.com provides a step-by-step tutorial for configuring a modem server in Windows 2000. Microsoft BackOffice Small Business Server includes a Modem Sharing service. To use the service, client software specific to each computer's operating system must be installed on all client computers. The client software is available from Microsoft's support site.

Get software to set up a network modem server

A modem server can be run on a simple PC as well as a server. There are several modem server software packages available that allow you to pool a modem on a PC. Just set up an internal or external modem on the PC, then install the network modem server software.

I recommend: DEKSI Modem Pooling from DEK Software International and NetModem from pcmicro.com are software applications that allow computers on a network to share a modem as well as other serial devices.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  Be sure you have the most current firmware and drivers for the modem installed on the modem server. Check for updates frequently to keep your modem running smoothly.