+FAE Automatic Data/FAX Handshake (FAX Class 2)

+FAE Automatic Data/FAX Handshake (FAX Class 2.0)

Type
parameter command

Value range
0,1; Default value: 0

Stored by &Wn no Displayed by &V no Values +FAE=0 DATA/FAX discrimination disabled. +FAE=1 DATA/FAX discrimination enabled. Description When the modem is configured for Class 1 operation (+FCLASS=1), the +FAE command invokes automatic determination of data or FAX incoming calls, and uses the DATA and FAX result codes. The +FAE command is valid for all +FCLASS values, but affects modem behavior only when +FCLASS=1. If +FAE=0, then incoming calls must be answered by DTE commands and the modem does not use the FAX or DATA result codes. If +FAE=1 and the modem answers a call, the type of calling station may be determined by detection of calling tone or by probing during handshake. If the calling station is a FAX machine or modem, then the answering modem sends flag idle signal (V.21 modulation) and sends the FAX result code to the DTE. The DTE then sends the appropriate Class 1 commands to the modem to complete the call. If the calling station is a data modem, the answering modem completes the handshake, sets +FCLASS=0, sends the DATA result code to the DTE, and then sends the normal data call result codes to the DTE to complete the call setup. If +FAE=1, then the silent period after an answer modem goes off hook is 4 seconds instead of the usual 2 seconds. This allows time to detect a FAX calling tone before sending answer tone. +FAE is reset to value 0 when a Z or &F command is executed. Click here to return to the Contents page.