Section 5 - At Command Set And S - Registers; Standard Commands - Mitsubishi Electric A2S-MODEM User Handbook Manual

Section 5 – AT Command Set and S - Registers
All commands below are preceded with AT. The commands are not case sensitive.

5.1 Standard Commands

Command Function
A/ Re-execute command
A Go off-hook and attempt to answer an incoming call
B0 Select V.22 connection at 1200bps
B1 Select Bell 212A connection at 1200bps
C1 Return OK Message
Dn Dial modified by parameter n
E0 Turn off command echo to terminal
E1 Turn on command echo to terminal
F0 Select auto-detect mode (equivalent to N1)
F1 Select V.21 or Bell 103 line modulation
F2 Reserved
F3 Select V.23 line modulation
F4 Select V.22 or Bell 212A 1200bps line modulation / speed
F5 Select V.22bis line modulation
F6 Select V.32bis or V32 4800bps line modulation / speed
F7 Select V.32bis 7200bps line modulation / speed
F8 Select V.32bis or V.32 9600bps line modulation / speed
F9 Select V.32bis 12000bps line modulation / speed
F10 Select V.32bis 14400bps line modulation / speed
H0 Initiate hang-up sequence
H1 If on-hook go off-hook and enter command mode
I0 Report product code
I1 Report pre-computed checksum
I2 Report OK
I3 Report firmware revision and interface type
I4 Report response programmed by an OEM
I5 Report the country code parameter
I6 Report modem data pump model and code revision
I7 Reports the DAA code
L0 Set low speaker volume
L1 Set low speaker volume
L2 Set medium speaker volume
L3 Set high speaker volume
M0 Turn speaker volume off
M1 Turn speaker on during handshaking and turn speaker off
M2 Turn speaker on during handshaking and while receiving carrier
M3 Turn speaker off during dialling and receiving carrier and on during answering
N0 Turn off auto-mode detection
N1 Turn on auto-mode detection
O0 Go on-line
O1 Go on-line and initiate a retrain sequence
P Dial modifier, force pulse dialling
Q0 Allow result codes to DTE
Q1 Inhibit result codes to DTE
Sn Select S-Register n
=v Set the value of S-Register to value v
? Return the current value of parameter
T Dial modifier, force DTMF dialling
V0 Report short form (terse) result codes
V1 Report long form (verbose) result codes
W0 Report DTE speed in EC mode
W1 Report line speed. EC protocol and DTE speed
W2 Report DCE speed in EC mode
X0 Report basic call progress result codes i.e. OK, CONNECT, RING, NO CARRIER
(also for busy if enabled, and dial tone not detected), NO ANSWER and ERROR.
27