3Com DIGITAL MODEM User Manual page 46

B-2 A
PPENDIX
Table B-1 AT Command Set Summary (continued)
Command Function (Example)
&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 I0)
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)
SN? Read configuration register
(AT S60?)
SN= Write configuration register
(AT S60=64)
(continued)
B: AT C , R
OMMANDS
, R
EGISTERS AND ESULT
Description
&D0 causes digital modem to ignore DTR
from host.
&D1 causes digital modem to enter
command state on detecting on-off
transition of DTR.
&D2 causes digital 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.
I0 displays the product and options ID.
I1 displays the flash memory checksum.
I4 displays the modem product code,
precomputed checksum, firmware
revision number, model, interface type,
country code, and data pump model.
Causes the digital 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.
Reads a specific S register setting.
Writes to a specific S register.
C
ODES