Siemens M1 manual Overview of the S-registers Please note, Off

Technical reference section

Overview of the S-registers

Please note:

The tables below do not include the reserved registers. Making entries in these unlist- ed, reserved registers can cause the GSM module to malfunction.

Sx	Meaning
S0	Number of ringing signals after which the system will answer automatically,
	i.e. the GSM module goes off-hook after the "n"-th ringing signal. Entering a
	value for n from "1" to "5" activates auto-answer. The maximum value is 5
	ringing signals. The value "0" deactivates auto-answer. The factory setting is
	"0".
S1	Internal counter for ringing signals. Each incoming ringing signal increments
	the register contents by one. If the call was answered, the register is reset
	to "0" after a preset interval. This is a read-only register.
S2	ASCII value of the escape command characters. The factory setting for all
	countries is "43", which corresponds to the ASCII characters +++. S2 can
	be set to any value from "1" to "127". If "0" or a value greater than "127" is
	set, the escape command character is deleted. When the &D1, &D2 and
	&D3 options are enabled, the GSM module returns to command mode as
	soon as it detects that the level of the DTR signal has changed from ON to
	OFF.
S3	ASCII value of the <CR> character. The factory setting for all countries is
	"13". <CR> terminates command lines and initiates their execution, as well
	as terminating result codes. Permissible values are from "0" to "127".
S4	ASCII value of the <LF> character. The factory setting for all countries is
	"10". For long, alphanumeric result codes, <LF> is output after the <CR>
	character. Permissible values are from "0" to "127".
S5	ASCII value of the Backspace character. The factory setting is "8". Permissi-
	ble values are from "33" to "127".
S7	Wait time for connection after dialing. If no connection is detected within
	the specified period of time, the GSM module goes on-hook. Permissible
	values are from "0" to "60".
S12	Wait time for AT commands in 50ths of a second. The period of time speci-
	fied here must elapse before and after the escape sequence is entered so
	that the GSM module can recognize it as a command. The factory setting
	for all countries is "50" (= 1.0 s). Do not set too short of a wait time. Permis-
	sible values are from "0" to "255". As a rule, this value should be no less than
	"20".

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