Example #4: Receiving An Incoming Fax Call In Speakerphone Or Tad Mode And Switching To Fax Mode - US Robotics 56K USB Modem User Manual

Command/Response
AT+VLS=7
OK
The speakerphone user picks up the phone and hears the caller from the other end. Conversation
continues for awhile. When it ends, the speakerphone user hangs up.
Command/Response
ATH
OK
Note: When the local phone goes off-hook in the middle of a speakerphone call, the speakerphone discon-
nects, and the DCE returns <DLE>-H to the DTE.
When the speakerphone is on, call waiting (hold operation) is initiated by the following:
Command/Response
ATD!
OK
Example #4: Receiving an Incoming FAX Call in Speakerphone or TAD
Mode and Switching to FAX Mode
In this example, the sequence begins with the user or telephone answering device (TAD) taking the
speakerphone off-hook and detecting a FAX calling tone from the other end.
Command/Response
<DLE>-c
AT+FCLASS=1
OK
ATA
OK
Call is answered. Attach internal speaker and microphone to the line, DCE
off-hook.
DCE responds. Now in speakerphone mode, connected to the line (call is
answered).
DTE issues standard command to terminate call.
dCE responds. Speakerphone goes on-hook. Speaker and microphone are
detached from system, and modem returns to data mode (+FCLASS = 0).
DTE sends hold command to DCE.
DCE responds.
DCE detects FAX calling tone from the remote FAX and informs the applica-
tion by sending DLE-c sequence.
Application switches modem out of voice mode and into FAX mode.
DCE responds. Now in FAX mode, still off-hook and connected to incoming
call.
Application instructs modem to answer FAX call using standard AT com-
mands.
DCE responds. The call is answered, and modem continues with procedures
to establish connection and receive FAX transmission. The application soft-
ware then disconnects the call when the FAX is done and returns to data
mode (+FCLASS=0).
Description
Description
Description
Description
Command Reference - 112
56K USB Modem
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