User guide

Appendix A – Upgrading the Modem’s Firmware
Multi-Tech Systems, Inc. MT9234ZBA-Series User Guide 31
1. If you are not already at the MultiModem ZBA Firmware page of the Multi-Tech Web site, follow the
procedure in “Identifying the Current Firmware Version.”
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, click the Flash Wizard utility for your operating system to download it,
and save it in the same folder.
Extracting the Upgrade Files
1. Install the Flash Wizard utility by double-clicking the 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\.
Clearing Your Stored Parameters
Before you clear your modem’s flash memory, record the parameters that are currently stored so you can
reprogram it after flashing. After you have recorded them, send the AT&W1Z command to the modem to clear
the stored parameters.
4. Run your favorite terminal program.
5. In the program’s terminal window, type AT&V and press Enter to list your modem’s current parameters.
6. Record your parameters by saving the screens and sending them to your printer.
7. Type AT&W1Z and press Enter to clear your stored parameters and reset your modem to factory default.
8. Close the terminal program.
Upgrading 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).
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
Identifying Devices dialog box is displayed as Flash Wizard locates and identifies the devices connected to
your system.
Note: If the message ERROR: No valid devices detected is displayed, verify that the modem is turned on and
that all cables are correctly and securely attached. Verify that the terminal application or software
application is turned off.
2. Click the modem to be upgraded, and then click Next to proceed.
3. Select the port to be upgraded from the Port list, select the appropriate .HEX file from the Hex File list, and
then click Next to continue.
Note: Do not use FLASHLDR.HEX. This file is used internally by Flash Wizard.
4. The Progress dialog box appears, showing a status bar that indicates the progress of the upgrade.