C-1
Appendix C

Attention (AT) Commands for Fax

In This Appendix

This section describes fax control and management (AT+)commands.

AT Command Set

AT (AT tention) commands are character sequences that you enter from
a computer or network management system (NMS) to control and
manage a modem.
The semi-colon is the separator character. Fax fax commands must be
the last on the line when fax commands are entered on a line with other
fax or data commands.
Table 2-1. Fax Class 1 AT Command Set
Command Option Description
+F commands control fax operation.
For fax parameters:
•The AT+F[parameter]? command returns the options for the parameter, or, if the
parameter is not supported, ERROR.
•The AT+F[parameter]=? command returns the current option for the parameter, or, if
the parameter is not supported, ERROR.
•The AT+F[parameter]=[value] command sets the option for the parameter, or, if the
option or parameter is not supported, returns ERROR.
Capabilities Identification and Control Commands
+FCLASS?
or
+FCLASS=?
Service Class
Reads the modem’s Service Class.
0 Data modem
1 Service Class 1 fax modem
2.0 Service Class 2.0 fax modem
The characters AT or at precede all commands except: +++, #####, and A/
Default (pre-set) options are underlined.