Technics MT5634SMI-92, MT5634SMI-34 manual AT Commands, S-Registers, and Result Codes, ring

Chapter 5 – 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	1	Sets the number of rings until the modem answers. ATS0=0 disables
				auto answer completely.
S1	1 ring	0–255	0	Counts the rings that have occurred.
S2	decimal	0–127	43 (+)	Sets ASCII code for the escape sequence character.
		128–255		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 character.
		33–127		Values greater than 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	35-65*	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	0–65	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	1–254	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 length of time that the modem waits before disconnecting
				when no data is sent or received. A value of zero disables the timer.
				See also the \T command
S35	decimal	0–1	1	0 disables, 1 enables the V.25 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 selected. (See S48.)
S37	decimal	0–19	0	Sets the maximum V.34 “upstream” speed at which the modem
				attempts to connect.
				0	= maximum speed
				1	= reserved
				2	= 1200/75 bps
				3	= 300 bps
				4	= reserved
				5	= 1200 bps
				6	= 2400 bps
				7	= 4800 bps
				8	= 7200 bps
				9	= 9600 bps

10 = 12000 bps

11 = 14400 bps

12 = 16800 bps

13 = 19200 bps

14 = 21600 bps

15 = 24000 bps

16 = 26400 bps

17 = 28800 bps

SocketModem Global MT5634SMI Developer’s Guide 40