Multi-Tech Systems MT5600DSVD manual Registers, Register Unit Range Default Description

MultiModemDSVD 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	1	Sets the number of rings before the mo-
				dem answers. ATS0=0 disables autoan-
				swer 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
		128–255		character. 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 char-
				acter.
S5	decimal	0–32	8 (^H)	Sets the ASCII code for the backspace
		33–127		character. Values greater than 32 disable
				backspace.
S6	seconds	2–255	2	Sets the time the modem waits after it goes
				off-hook before it begins to dial the tele-
				phone 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 modifi-
				er, and the time the modem waits for the
				dial tone after encountering W in the dial
				string.
S8	seconds	0–255	2	Sets the length of a pause caused by a
				comma character in a dialing command.
S9	100 ms	1–255	6	Sets the time, in tenths of a second, that
				the carrier must be present before the mo-
				dem considers it valid.
S10	100 ms	1–255	14	Sets how long a carrier signal must be lost
				before the modem disconnects.
S11	1 ms	50–255	95	Sets spacing and duration of dialing tones.
S12	20 ms	0–255	50	Defines the maximum period, in fiftieths
				of second, allowed between receipt of the
				last character of the three escape character
				sequence from the computer and the send-
				ing of the OK result code to the computer.
				(Escape code guard time).

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