Data Commands and Registers (FAX)


Commands
The &F command sets all data and FAX parameters to their factory default values. The default FAX Class 2.0 parameter values are identified in [2]. The only parameter for Class 1 is +FCLASS; its default value is 0.

The Zn commands load the appropriate set of data parameters and does not change any FAX parameters.

The &Wn commands store data parameters. FAX parameters are not stored; most FAX programs send FAX parameters to a modem before using the modem for a call.

All data commands (the commands that do not begin with +F) are valid when the modem is in either data or FAX mode. However, the following data configuration commands affect only the data mode.
Bn    Cn  Nn   Yn   &Bn  &Gn      

&Mn  &On  &Qn  &Rn  &Un  &Xn      
When the modem is in the FAX mode (+FCLASS=1 or 2.0), the &Cn command invokes the RLSD behavior associated with the &Q5 command.

The Mn - Select Speaker Function Option command determines when the speaker is turned on and off. When in the FAX mode, on until carrier shall mean on until the +FCON response is sent to the DTE for a Class 2.0 modem, or until the initial CONNECT result code for Class 1. The speaker shall actually be turned off within 5 ms before or after the response is sent.

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