101
Appendix C - AT Command Summary
Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide
&Fn n = 0, 8 or 9 &F loads factory default values from ROM.
* &F8 reads factory default values and switch settings
when &F is issued.
&F9 reads parameters stored in non-volatile
memory when &F is issued.
$Fn n = 0 or 1 $F0 means do not fall back to normal connect if CR
received.
* $F1 means fall back to normal connect if CR
received.
$FCn (MT2834BL) n = 0 or 1 $FC0 means no transmit of 5 second 2100Hz signal.
* $FC1 transmits 5 second 2100Hz signal.
&Gn n = 0, 1 or 2 * &G0 turns off CCITT guard tones.
&G1 turns on CCITT 550 Hz guard tone.
&G2 turns on CCITT 1800 Hz guard tone.
Hn n = 0 or 1 H0 means Hang Up (go on hook).
H1 means Go Off Hook.
$Hn n = 1 thru 3 $H1 brings up Help Screen #1.
$H2 brings up Help Screen #2.
$H3 brings up Help Screen #3.
In n = 0,1or 2 I0 requests modem ID #.
I1 requests firmware revision #.
I2 for MTS internal use.
I9 Read Only Command enables display of Windows 95
Autodetect characteristics
LLists all stored telephone numbers in memory.
L5 L5 lists all current operating parameters.
L6 L6 lists all current S-Register values.
L7 L7 lists additional parameters.
L8 L8 lists On-Line Diagnostics.
L9 L9 Displays Signal Strength Information.
L10 L10 Displays Signal to Noise Ratio Information.
L11 L11 Displays Noise Information.
#Ln n = 0 thru 3 * #L0 means modems negotiate V.42 Mode.
#L1 means MNP on and LAP-M off.
#L2 means LAP-M on and MNP off.
#L3 means no detection phase but go directly to
LAP-M.
$LLn n=0 or 1 * $LL0 is Multi-Tech’s lease-line handshake
$LL1 is the V.34 leased-line handshake
Mn n = 0 thru 3 M0 means Monitor speaker always Off.
* M1 means Monitor speaker On until carrier detected
M2 means Monitor speaker always On.
M3 Monitor speaker on during dialing/off during
handshaking.
*Factory Default