Multi-Tech Systems MT2834BA Series, MT2834BL Series manual Dial Tone

		Appendix C - AT Command Summary
Xn	n = 0,1,2,3 or 4	* X0 selects Basic Result Codes (w/o CONNECT
		1200, CONNECT 2400).
		X1 selects Extended Result Codes (w/CONNECT
		1200, CONNECT 2400).
		X2 selects Standard AT Command set with NO
		DIAL TONE.
		X3 selects Standard AT Command set with BUSY.
		X4 selects Standard AT Command set with NO
		DIAL TONE and BUSY.
#Xn	n= 0 or 1	* #X0 selects single XOFF character sent until XON
		level returns.
		#X1 selects multiple XOFF characters after buffer
		level is full.
Yn	n = 0 or 1	* Y0 disables sending or responding to long space
		“break”.
		Y1 enables sending or responding to long space
		“breaks”.
Z		All configuration parameters are reset to default
		values.
,	In Dial Command	Causes pause during dialing.
;	In Dial Command	Causes return to Command Mode after dialing.
!	In Dial Command	Causes modem to flash On-Hook.
@	In Dial Command	Causes modem to wait for ringback, then 5 seconds
		of silence before processing next part of command.
+++AT<CR>		In-band Escape Sequence. Places modem in
		Command Mode while still remaining On-Line. Enter
		+++ followed by the letters A and T, up to ten
		command characters, and a RETURN.
BREAK AT<CR>		Out-of-band Escape Sequence. Places modem in
		Command mode while still remaining On- Line.
		Enter a BREAK signal, followed by the letters A and
		T, up to sixty command characters, and hit
		RETURN.

* Factory Default

Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 104