3-4 CHAPTER 3: M ODES OF O PERATIONData and FaxModesOnce you are in Command Mode, you can initialize the modem in Dataor Fax mode.Fax operations require facsimile-compatible communications softwarethat can send or receive Group III faxes. Follow the instructions in your faxsoftware manual.The modems default operating mode is Data Mode. Most fax softwareautomatically switches the device to Fax mode when you run theprogram, and resets the device to Data mode when you exit the program.Example: Sending AT+FCLASS=1, allows you to receive faxes from faxmachines.Class 1 and Class 2.0 Fax Modes refer to standards set by the ElectronicIndustries Association/Telecommunications Industry Association. Class 1Fax Mode is the minimal standard for computer-faxmodem interface.Class 2.0 Fax Mode refers to the extended computer-faxmodem interface.If you want the modem prepared to Mode CommandMake calls to and receive calls from othermodemsData Mode AT+FCLASS=0Make calls to and receive calls from analogfacsimile devices, such as fax modems andfax machinesFax Mode AT+FCLASS=1(Class 1 Fax Mode)orAT+FCLASS=2.0(Class 2.0 FaxMode)
