HP 525 5/XX Technical Reference Manual page 141

Enter the following AT commands to verify or change the firmware
country code:
AT Command Comments
AT tests that the PC and modem can
communicate.
ATE1 enables character echo so that the
modem commands appear on the
screen.
ATI5<cr> shows the current country code.
AT*NCxxx<cr> where xxx is the three digit firmware
country code, as shown in the table on
page 137.
ATZ<cr> resets the modem to the new
configuration.
ATI5<cr> verifies the current country code.
When you have finished, the HyperTerminal session can be saved and
used again, or you can exit without saving the session.
6 Aztech AT3300 Audio Fax/Data Modem
European Firmware and Telephone Line Configuration
Modem
Comments
Response
OK modem confirmation
OK modem confirmation
xxx current code
configuration is
displayed
OK modem confirmation.
OK modem confirmation.
OK modem confirmation.
xxx current code
configuration is
displayed
OK modem confirmation.
English 141