Appendix C - Installing A Modem Under Linux - Multitech MultiModem II MT5600BA-V92 User Manual

Appendix C - Installing a Modem Under Linux

Introduction
This appendix explains how to install a modem on a computer operating under the Red Hat Linux 6.2 operating
system. Other versions of Red Hat and other Linux operating systems should be similar. Briefly, in Linux, you do not
need drivers for most standard external modems and most internal ISA bus modems. Programs in Linux commonly
call upon the port, rather than the modem.
Standard Linux Serial Port Definitions
PC port
Com1
Com2
Com3
Com4
Installation
Connect the external modem to an available serial port.
Setup
This section describes how to make sure Linux can talk to the modem and be able to dial up to the Internet. Linux
can use different programs and desktops depending on who made the Linux operating system and what version it
is. The following procedures use the most commonly installed components of Red Hat 6.2. More information can
be found in your Linux OS owner's manual.
Using the Terminal Program Minicom to Verify Operation
1. At the command prompt, type minicom –s and press Enter.
2. Select Serial port setup and press Enter.
3. From Serial port setup, use the A key to access Serial Device, and then press Enter.
4. Press E .
SC
5. You are now in the Minicom terminal. Type AT and press Enter. The LCD should display OK to verify the
operation. Alternately, dial a phone number to verify line operation
6. To leave Minicom, press C
7. On the help menu, press X to exit.
Using the Modem to Call the Internet
Linux allows different graphic user interfaces (GUI). In the following steps, we'll use the Gnome Desktop GUI and
assume that the Internet Service Provider (ISP) you are calling assigns you the Domain Name Service (DNS) and
Internet Protocol (IP) addresses. For more information on DNS or IP, see the Linux OS owner's manual or contact
your ISP.
1. On the Task Bar at the bottom of the LCD, select the Gnome Footprint.
2. Select Internet from the menu.
3. Select Dialup Configuration Tool.
4. Select Add, and then click Next.
5. Enter the connection name and phone number, and then click Next.
6. Enter your user name and password, and then click Next.
Multi-Tech Systems, Inc. MT5600BA-V92 User Guide
Linux port
ttyS0
ttyS1
ttyS2
ttyS3
+ A, and then press Z.
TRL
Appendix C – Installing a Modem Under Linux
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