Campbell Scientific COM320 Voice Communications Modem - Manual (Page 39)

Appendix B. Updating and Configuring the COM320
7) Click the Start button.
8) In the resulting file open dialogue box that appears, select the file that
should be sent as the modem's operating system.
Do not attempt to load any operating system other than
that designed for the COM320 modem. CAUTION
9) The program should now send the operating system to the modem.
Interrupting this process may corrupt the modem operating
system. CAUTION
FIGURE B-1. Send OS Screen in Device Configuration
B.5 Changing COM320 Settings
There are two items that can be configured in the COM320, the number of
rings before the COM320 answers and the country code. You will need the
Campbell Scientific Device Configuration Utility ver 1.12 or newer and a USB
Type-A male to Type-B male cable to change these settings.
1) You must remove the top cover of the modem to expose the USB port.
This is done by first removing the five Phillips head screws on the sides of
the COM320.
B-5