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Appendix I: Flashing New Firmware into Modemulator Card
Firmware can be flashed into a Modemulator expansion card locally (pre-deployment) or remotely (post-
deployment). The following steps will describe how to do local flashing. To do remote flashing, see
Appendix H
for details about Remote Access.
To flash new firmware into a Modemulator card:
You will need a local computer with a serial port and terminal application, and access to the Internet.
1. Download the new Modemulator firmware hex file from the
2. Connect the computer serial port to the Modemulator Terminal port with a serial cable. Run a terminal
application on the computer to facilitate sending commands into the Modemulator.
You will need to know how to send a hex file using ASCII protocol (text file) from your terminal
application. Consult the terminal application documentation for help.
3. Use the !! command to begin the procedure of flashing new firmware into the Modemulator card's
processor.
Example:
AT!!
The following message will be displayed:
Flash New Code
Are you sure [Y/N]?
Modemulator User Guide
Page 99 of 113
USR support website
onto your computer.
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