Motorola V.3600 On Hook H, Off Hook H1, Class 0 Operation +FCLASS=0, Class 1 Operation +FCLASS=1

Fax Operation

If the DTE sends a character while executing the answer command and before CED is completed, the call is released and the modem will send the NO CARRIER result code.

On Hook — H

In fax mode, the H command instructs the modem to stop any transmission and terminate the call by going on hook.

Off Hook — H1

The H1 command instructs the modem to go off hook. In fax mode, this might be used when the user has used manual dialing to place a fax call. In this case, no CNG tones are generated and the initial +FRH=3 is not implied; it must be explicitly issued by the software.

Class 0 Operation — +FCLASS=0

Setting the Service Class to 0 with the +FCLASS=0 command sets the modem in data mode. This default setting is normally only changed by software if needed.

Class 1 Operation — +FCLASS=1

Setting the Service Class to 1 with the +FCLASS=1 command configures the modem as a Class 1 fax modem. This command is normally only issued by the fax software if needed. When set, the LCD

displays FAX CLASS 1 MODE.

Service Class Indication — +FCLASS?

The current Service Class setting can be determined with the +FCLASS? command. A 0 response indicates the modem is configured for data mode while a 1 indicates it is set for fax mode. This information text is preceded and followed by <CR><LF> in addition to being followed by an appropriate result code response.

Service Class Capabilities — +FCLASS=?

The available Service Classes can be revealed by the +FCLASS=? command. The modem responds with the information text 0, 1 (preceded and followed by <CR><LF>), indicating that the modem supports both data communication and Class 1 fax operation.

9-6 V.3600