Siemens M1 User Manual
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gsm-m1-e.fm
GSM M1 Module, English: A24859-N4000-A100-1-7677
Technical reference section
26.2.96
S14: Command echo, result codes
Bit
Options
Values
0
Reserved
0
1
Command echo (ATEn)
0
1
Echo off
Echo on
2
Result codes (ATQn)
0
1
Display result codes
Suppress result codes
3
Short format mode (ATVn)
0
1
Result codes as digits
Result codes as text
4
Reserved
0
5
Reserved
0
6
Reserved
0
7
Reserved
0
S21: DTR and DCD options
Bit
Options
Values
0
Reserved
0
1
Automatic dialing when
DTR OFF -> ON (At%Dn)
0
1
Automatic DTR dialing on
Automatic DTR dialing off
2
Reserved
0
3
4
DTR options (AT&Dn)
0
1
2
3
Ignore DTR
GSM module changes to command
mode when it detects falling edge at
DTR (ON -> OFF)
Same as 1 but also disconnects call.
GSM module is initialized when it
detects falling edge at DTR
(ON -> OFF)
5
DCD options (AT&Cn)
0
1
DCD always ON
DCD with valid carrier
6
Reserved
0
7
Reserved
0