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

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