Example #5: Receiving An Incoming Data Call In Speakerphone Or Tad Mode And Switching To Data Mode; Example #6: Switching From Speakerphone Mode To Tad Mode; Example #7: Call Screening And Recording A Message Using Tad-Is101 <Dle> Shielded Method - US Robotics 56K USB Modem User Manual

Example #5: Receiving an Incoming Data Call in Speakerphone or
TAD Mode and Switching to Data Mode
In this example, the sequence begins at the point of the user or telephone answering device (TAD) taking
the speakerphone off-hook and detecting a data calling tone from the other end.
Command/Response
DLE>-e
AT+FCLASS=0
OK
ATA
CONNECT

Example #6: Switching from Speakerphone Mode to TAD Mode

In this example, the sequence begins with the user in speakerphone mode and intending to put the other
end on hold. The application may switch to TAD mode in hold state and play a music Wav file to the line.
Command/Response
AT+VLS=1
OK
AT+VTX
CONNECT
<Data>
<DLE><ETX>
OK
The application may switch back to speakerphone mode by following the example to switch from TAD
mode to speakerphone mode.
Example #7: Call Screening and Recording a Message Using TAD—
IS101 <dle> Shielded Method
The TAD application is loaded. The modem is initially idle in data mode (+FCLASS = 0).
Command/Response
RING
AT+FCLASS=8
OK
AT+VGT=128
OK
AT+VSM=132,8000
OK
DCE detects data calling tone from the remote modem and informs the appli-
cation by sending DLE-e sequence.
Application switches modem out of voice mode and into data mode.
DCE responds. Now in data mode, still off-hook and connected to incoming
call.
Application instructs modem to answer data call using standard AT com-
mands.
DCE responds. The call is answered, and modem continues with procedures
to establish connection.
Applications switches modem out of speakerphone mode and into TAD
mode.by sending DLE-e sequence.
DCE responds. Now in TAD mode.
DTE selects voice transmit mode.
DCE responds.
DTE plays music through modem to remote caller.
DTE indicates end of voice transmit data.establish connection.
DCE acknowledges switch back to voice command state.
DCE reports ringing from remote station.
The modem enters voice mode.
DCE responds.
Sets speaker volume to normal.
DCE responds.
DTE selects IMA ADPCM with 8.0 kHz sampling rate.
DCE responds.
Description
Description
Description
Command Reference - 113
56K USB Modem
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