
49
Command
Description
AT&K
Select flow control. Selects the flow control method
used to prevent the modem’s buffer from overflowing
with data.
AT&K0
Disable flow control.
AT&K3
Enable bidirectional hardware flow control RTS/CTS
(default)
AT&K4
Enable bidirectional XON/XOFF flow control.
Note on Flow Control. XON/XOFF is a software-based flow control method,
using standard ASCII control characters to pause or resume data transmission.
RTS/CTS pacing, a hardware-based method, uses an electrical signal. Signals
are exchanged as follow
RECEIVER
TRANSMITTER
CTS ON =========>
START SENDING
CTS ON <=========
RTS ON (ready to send)
CTS OFF =========>
RTS OFF (stop sending)
AT&S
Data Set Ready (DSR) signal. Controls all DSR
functions. DSR indicates when the modem is connected
to a communications channel and is ready.
AT&S0
DSR circuit always on. (default)
AT&S1
DSR circuit on during handshaking and on-line, off in
test mode or in idle mode.
Command Reference
Summary of Contents for FDSP34AI
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Page 2: ...2 On Line EXPRESS...
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