Multi-Tech Systems MT5634ZPX-PCI-V92 manual Registers, Register Unit Range Default Description

MultiModemZPX User Guide 4 AT Commands, S-Registers, and Result Codes

S-Registers

Certain modem values, or parameters, are stored in memory locations called S-registers. Use the S command to read or to alter the contents of S-registers (see previous section).

Register	Unit	Range	Default	Description
S0	1 ring	0, 1–255	0	Sets the number of rings until the modem
				answers. ATS0=0 disables autoanswer com-
				pletely. Range varies by country. Set S0=2
				for Caller ID.
S1	1 ring	0–255	0	Counts the rings that have occurred.
S2	decimal	0–255	43 (+)	Sets ASCII code for the escape sequence char-
				acter. Values greater than 127 disable escape.
S3	decimal	0–127	13 (^M)	Sets the ASCII code for the carriage return
				character.
S4	decimal	0–127	10 (^J)	Sets the ASCII code for the line feed character.
S5	decimal	0–32,	8 (^H)	Sets the ASCII code for the backspace char-
		33–127		acter. Values over 32 disable backspace.
S6	seconds	2–65*	2*	Sets the time the modem waits after it goes
				off-hook before it begins to dial the telephone
				number.
S7	seconds	1–255*	50*	Sets the time the modem waits for a carrier
				signal before aborting a call. Also sets the
				wait-for-silence time for the @ dial modifier.
S8	seconds	2–65	2	Sets the length of a pause caused by a comma
				character in a dialing command.
S9	decimal	0, 1–127	37 (%)	Sets ASCII code for remote configuration
				escape character. S9=0 disables remote
				configuration.
S10	100 ms	20–255	20	Sets how long a carrier signal must be lost
				before the modem disconnects.
S11	1 ms	50–150*	95*	Sets spacing and duration of dialing tones.
S28	decimal	0, 1–255	1	0 disables, 1–255 enables V.34 modulation.
S30	1 minute	0, 1–255	0	Sets the time the modem waits before it dis-
				connects when no data is sent or received. A
				value of zero disables the timer. See also the
				\T command
S35	decimal	0–1	0	0 disables, 1 enables the V.25 data calling
				tone, which allows remote data/fax/voice
				discrimination.
S36	decimal	0–7	7	Specifies the action to take in the event of a
				negotiation failure when error control is se-
				lected. See S48.

* These values may be different outside North America.

40