Registers | Multi-Tech Systems MT5600BA-V92 specs

Chapter 6 – S-Registers

Certain modem values, or parameters, are stored in memory locations called S-Rregisters. Use the S command to read or alter the contents of the S-Registers.

S-Registers

S-Reg	Unit	Range	Default	Description
S0	1 ring	0,1–255	country dep.	Number of Rings to Auto-Answer:Sets the number of rings required before the
				modem automatically answers a call. ATS0=0 disables autoanswer completely.
S1	1 ring	0–255	0	Ring Counter: Counts the rings that have occurred.
S2	decimal	0–127	43 (+)	Escape Character: Sets ASCII code for the escape sequence128–255
				character. Values greater than 127 disable escape.
S3	decimal	0–127	13 (^M)	Carriage Return Character: Sets the ASCII code for the carriage return character.
S4	decimal	0–127	10 (^J)	Line Feed Character: Sets the ASCII code for the line feed character.
S5	decimal	0–32	8 (^H)	Backspace Character: Sets the ASCII code for the backspace33–127
				character. Values greater than 32 disable backspace.
S6	seconds	2–255	country dep.	Wait Time Before Blind Dialing or for Dial Tone: Sets the time the modem
				waits after it goes off-hook before it begins to dial the phone number.
S7	seconds	1–255	country dep.	Wait Time for Carrier, Silence, or Dial Tone: Sets the time the modem waits for a
				carrier signal before aborting a call. Sets the wait for silence time for the @ dial
				modifier. Sets the time the modem waits for a dial tone after encountering W in the
				dial string.
S8	seconds	0–255	2	Pause Time for Dial Delay: Sets the length of the pause caused by a comma
				character in a dialing command.
S9	100 ms	1–255	6	Carrier Detect Response Time: Sets the time, in tenths of a second that the
				carrier must be present before the modem considers it valid.
S10	100 ms	1–255	14	Lost Carrier to Hang Up Delay: Sets how long a carrier signal must be lost before
				the modem disconnects.
S11	1 ms	50–255	country dep.	DTMF Tone Duration: Sets spacing and duration of dialing tones.
S12	20 ms	0–255	50	Escape Prompt Delay (EPD): Defines the maximum period, in fiftieths of second,
				allowed between receipt of the last character of the three escape character
				sequences from the computer and the sending of the OK result code to the
				computer (escape code guard time).
S13	decimal	0, 1–127	42 (*)	Remote Configuration Escape Character: Sets the ASCII code for the remote
				configuration escape character. ATS13=0&W disables remote configuration. For
				use with the MT5600BA and MT5600BR only.
S15	minutes	0, 10–255	30	Dialup Backup: Sets the length of time the modem waits after making a dial-up
				connection before it checks for a restored lease line. Zero disables dial backup. For
				use with the MT5600BA and MT5600BR only.
S17	minutes	0–255	1	Dialup Connection: Sets the length of time the modem waits after a lease line fails
				before it attempts a dial-up connection. For use with the MT5600BA and
				MT5600BR only.
S24	seconds	0–255	0	Sleep Inactivity Timer: Sets the number of seconds that the modem operates in
				normal mode with no detected telephone or serial port activity before it enters low-
				power sleep mode. The timer is reset upon any serial port or telephone line activity.
S25	10 ms (async) 0–255		5	Delay to DTR OFF: Sets the length of time that the modem1 ms
				(sync) ignores DTR while taking the action specified by &D .
S26	10 ms	0–255	1	RTS to CTS Delay: When &R0 is commanded, sets the time after detecting an
				OFF-to-ON transition on RTS before the modem turns CTSON. Applies to
				synchronous operation only.

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G)

Chapter 6 – S-Registers

S-Registers

S-Reg

Unit

Range

Default

Description