44
On-Line
EXPRESS
BASIC AT COMMANDS
(default values are highlighted)
Command Description
AT
Attention characters
A
Answer command
A/
Re-Execute last command
ATB
Line Modulation Options. Configures the modem to the
to the desired communications standard setting at a
particular speed.
ATB0
Selects the V.22 protocol when the modem is at 1200 bps
and V.21 when the modem is at 300 bps.
ATB1
Selects the Bell 212A protocol when the modem is at
1200 bps and the Bell 103 protocol when the modem is at
300 bps. (default)
ATB2
Selects V.23 originate mode receive @ 1200bps (transmit
75bps); answer mode receive 75bps (transmit 1200bps)
ATB3
Selects V.23 originate mode receive @ 75bps (transmit
1200bps); answer mode receive 1200bps (transmit 75bps)
ATB15
Selects V.21 when the modem is at 300bps.
ATB16
Selects Bell 103 when the modem is at 300bps.
ATD. The ATD command begins the dialing sequence. The following
modifiers are used in conjunction with the ATD command.
Dial
Options
Description
ATD
none
Dial. (ATD followed by phone number)
ATDL
none
Re-dial.
ATDP
none
Pulse (rotary) dial. 10 pulses per second.
ATDT
none
Touch tone dial (DTMF).
ATDW 1-255sec
Wait for dial-tone.
ATD,
0-255sec
Pause.
ATD@
none
Wait for quiet answer.
ATD!
none
Initiate hook flash.
ATD;
none
Return to command state after dialing.
ATD^
none
Disable calling tone.
ATDS=0-3 none
Dial stored number. (See AT&Z)
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