3Com Courier, Reference

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4-4 C
HAPTER
4: M
ODES OF
O
PERATION
Class 1 and Class 2.0 Fax Modes refer to standards set by the Electronic
Industries Association/Telecommunications Industry Association. Class 1
Fax Mode is the minimal standard for computer-faxmodem interface.
Class 2.0 Fax Mode refers to the extended computer-faxmodem interface.
If you are not sure whether your modem is in Data or Fax mode, use the
AT+FCLASS?
command
.
Whenever the modem is reset using the ATZ command or by turning the
power off and then on, it will reset to Data Mode
If the modem
returns a value of
This indicates
0 Data Mode
1 Class 1 Fax Mode
2.0 Class 2.0 Fax Mode.