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D Installing Under Linux
34
MultiModemZPX User Guide
Note: The preceding example places the modem on COM3. Your IRQ and port
may vary. Substitute the IRQ and port values in the example with the values for
your computer as listed in the results of the command issued in step 3. To set
Linux to configure the modem at boot-up, use an editor such as “jed” and add the
setserial command to the end of the rc.local file.
5. Once you’ve completed your installation, you must configure your modem for country-
specific operation. See Chapter 2 for information on using AT commands to configure your
modem for use in your country.
Using the Terminal Program Minicom to Verify Operation
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.
1. At the command prompt, type minicom –s and press E
NTER.
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 ESC.
5. You are now in the Minicom terminal. Type AT and press ENTER. The screen should display
OK to verify the operation. Alternately, dial a phone number to verify line operation
6. To leave Minicom, press CTRL + A, and then press Z.
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 screen, 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.
7. Select Normal ISP if your ISP is not listed, and then click Next.
8. Click Finish.