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Appendix C – Upgrading Your Modem

32 Multi-Tech Systems, Inc. MT9234ZPX User Guide

5. If the firmware version number is greater than the firmware version number found in “Step 1: Identify

the Modem Firmware,” your modem has an older firmware version. Continue with “Step 3: Download

the Upgrade File.”

Warning: The first digit of the new firmware must match the first digit of the old firmware, or the

modem may not work properly. E.g., if your current firmware version is 4.16, replace it only with

4.xx firmware, not 6.xx firmware.

Step 3: Download the Upgrade File

1. If you are not already at the MultiModem Firmware page of the Multi-Tech Web site, follow the

procedure in “Step 2: Identify the Current Firmware.”

2. Download the upgrade file for your modem by clicking its name, and save the file in a temporary

folder on your hard disk.

3. In the same section of the Web page, download the Flash Wizard utility by clicking it, and save it in

the same folder. Alternately, install the Flash wizard from the MultiModem compact disc.

Step 4: Extract the Upgrade Files

1. Install the Flash Wizard utility by double-clicking the Flash Wizard file name in Windows Explorer.

2. Extract the upgrade files by double-clicking the file name. The extracted files include a .HEX file,

which contains the upgrade data, and a Readme file.

3. Copy the upgrade .HEX file into the Flash Wizard folder, which, in a default installation, is at

C:\Program Files\MultiTech Systems\Flash Wizard\.

Step 5: Document and Clear Your Stored Paramenters

Before you flash your modem, you should record the parameters that are currently stored in it so you can

reprogram it after flashing. After you have recorded them, send the AT&W1Z command to the the

modem to clear the stored parameters.

1. Run your favorite terminal program.

2. In the program’s terminal window, type AT&V and press E

NTER to list your modem’s current

parameters.

3. Record your parameters by saving the screens and sending them to your printer.

4. Type AT&W1Z and press E

NTER to clear your stored parameters and reset your modem to factory

default.

5. Close the terminal program.

Step 6: Upgrade the Modem’s Firmware

Before you begin the following procedure, read the README.TXT file extracted from the upgrade

archive file. Note the file name for the new firmware (example: ARQG125A.HEX). Also, if you are using

Windows NT, you must disable Windows RAS and Microsoft Fax Service before upgrading the modem’s

firmware. To disable RAS and your Fax service, Click Start | Settings | Control Panel, and then double-

click Services. Select Remote Access Server , and then click the Startup button. Select Manual as the

startup type, and then click OK. Do the same for any fax service. Close any other programs that might be

accessing the modem’s Com Port.

WARNING: Never install an older version of firmware over a newer version. Doing this WILL DESTROY

THE FLASH PROM! If the flash PROM is destroyed, the modem must be sent in for repair.

1. Run Flash Wizard by double-clicking its icon or file name, or by selecting it from the

Start menu. The program begins by identifying devices attached to your computer.

2. Select the modem to be upgraded, and then click Next to proceed.

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