Specifications and Regulatory Information
Modem Reference Information
136 Reference Guide
Modem Reference (Ambit)
AT Commands (Ambit)
In the following AT command table, default settings are shown in bold. All listed AT
commands except A/ must be preceded by “AT.”
Command Function (Ambit)
A/ Re-execute command (not preceded by AT)
A Go off-hook and attempt to answer a call
B0 Select V.22 connect @1200 bps
B1 Select Bell 212A connect @1200 bps
C1 Return OK message
Dn Dial modifier
E0 Turn off command echo
E1 Turn on command echo
H0 Initiate a 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” if the calculated checksum equals the prestored checksum or if the prestored checksum value
is FFh
I3 Report firmware revision, model, and interface type
I4 Report response programmed by OEM
I5 Report the country code parameter
I6 Report modem data pump model and code revision
I7 Report 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 off
M1
Turn speaker on during handshaking and turn speaker off while receiving carrier
M2 Turn speaker on during handshaking and while receiving carrier
M3 Turn speaker off during dialing and receiving carrier and turn speaker on during answering
N0 Turn off automode detection
N1
Turn on automode detection
O0 Go on-line
O1 Go on-line and initiate a retrain sequence
P Force pulse dialing
Q0
Allow result codes to DTE
Q1 Inhibit result codes to DTE
Sn Select S-Register n as default
Sn? Return the value of S-Register n
Sn=v Set default S-Register n to value v
T Force DTMF dialing
V0 Report short form result codes
V1
Report long form result codes
W0
Report DTE speed only
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