Registers | Multi-Tech Systems MT5634ZLXE-T, MT5634ZLX 2 instruction

Chapter 3 - AT Commands, S-Registers, and Result Codes

S-Registers

S-Registers are accessed using the S command (ATSn=x). The S-Registers supported by the MT5634ZLX/E are described below.

S-Reg. Values Default Description

S0=	0	- 255 000		S0 sets the number of the rings required before the modem
				automatically answers a call. Set S0=0” to disable auto-answer
				mode.
S1=	0	- 255 000		S1 counts the incoming rings and stores the value to this register.
				The value of this register is incremented with each ring. If no rings
				occur over an 8 sec. interval, this register is cleared. User can read
				but should not change this value.
S2=	0	- 255 043		S2 holds the decimal value of the ASCII character used as the
				escape character. The default value (043) corresponds to an ASCII
				character “+”. A value of 128 to 255 disables the escape process
				(i.e., no escape character is recognized).
S3=	0	- 127 013		S3 holds the decimal value of the Carriage Return <CR> character
				used as the command line and result code terminator. Pertains to
				asynchronous operation only.
S4=	0	- 127 010		S4 holds the decimal value of the character recognized as a line
				feed. The line feed control character is output after the carriage
				return control character if verbose result code are used.
S5=	0	- 32,	127	S5 holds the decimal value of the character recognized as a
				backspace. The modem will not recognize the backspace character
				if this register is set to a value greater than 32008.
S6=				S6 sets the length of time, in seconds, that the modem must wait
				(minimum 2 seconds even if the value is less than 2) after going off-
				hook before dialing the first digit of the telephone number.
S7=				S7 sets the time, in seconds, that the modem must wait before
				hanging up because carrier is not detected
S8=	0	- 65	002	S8 sets the time, in seconds, that the modem must pause when the
				“,” dial modifier is encountered in the dial string.
S10=	1	- 255 020		S10 sets the length of time, in tenths of a second, that the modem
				waits before hanging up after a loss of carrier.
S11=	50 - 150 095 S11 sets the DTMF duration and inter digit delay. Sets the duration
				and spacing, in mini-seconds, in DTMF touch tine dialing.
S28=	0	- 255 001		V.34 modulation enable/disable:
				0: disabled
				1- 255: enabled
S30=	0	- 90	000	Inactivity timer. S30 sets length of time, in minutes, that the modem
				counts when there is no data flow in or out the DTE serial port. A

connection is disengaged when the counter reaches the preset value. Set S30 =0 to disable inactivity timer. For buffer mode only.