Multi-Tech Systems MT2834BA manual $FCn MT2834BL

		Appendix C - AT Command Summary
&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
L		Lists 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

Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 101