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B-2
A
PPENDIX
Table B-1 AT Command Set Summary (continued)
Command Function (Example)
DD
(ATDD5551234)
&D
DTR control (AT &D0)
E
AT command echo (AT E0)
&F
Restore factory defaults (AT &F)
H
Hang up (AT H)
I
Identification (AT I)
\N
Call Logging
O
Enter connect state (AT O)
Q
Result code control (AT Q0)
\Q
Serial port flow control (AT \Q1)
%R
Read all S registers (AT %R)
%S
Serial number
Sn?
Read configuration register
(AT S60?)
B: AT C
, S R
OMMANDS
,
R
EGISTERS
AND
ESULT
Description
Dials an outgoing TollMizer connection.
&D0 causes ISDN modem to ignore DTR
from host.
&D1 causes ISDN modem to enter
command state on detecting on-off
transition of DTR.
&D2 causes ISDN modem to hang up
current calls upon on-off transition of DTR
and prepares serial port to accept AT
command at any speed (default).
E0 disables the echo of AT commands
back to the host computer.
E1 enables the echo of AT commands to
the host computer (default).
Restores all factory default settings.
Hangs up the current connections.
I displays the model number.
\N displays the five latest incoming and
outgoing calls over the data and analog
ports. \N0 will clear this information.
Causes the ISDN modem to go out of
command mode into on-line mode.
Q0 enables the output of result codes
(default).
Q1 disables the output of result codes.
Q2 disables the output of result codes in
answer mode only.
\Q0 disables flow control.
\Q1 enables bidirectional XON/XOFF
software flow control.
\Q3 enables bidirectional RTS/CTS
hardware flow control (default).
Provides an output list of all S registers.
Displays serial number of ISDN modem.
Reads a specific S register setting.
C
ODES
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