Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 144 23.06.2010
duration>
Parameters
<mode> 0 Stop playing tone
1 Start playing tone
<tone> numeric type
1 Dial Tone
2 Called Subscriber Busy
3 Congestion
4 Radio Path Acknowledge
5 Radio Path Not Available / Call Dropped
6 Error / Special information
7 Call Waiting Tone
8 Ringing Tone
16 General Beep
17 Positive Acknowledgement Tone
18 Negative Acknowledgement or Error Tone
19 Indian Dial Tone
20 American Dial Tone
< duration> numeric type, in milliseconds.
Max requested value = 255*60*1000 = 15300000ms
(supported range = 3- 15300000)
Reference Note
z The default <tone>, if none entered, is General Beep.
z The default <duration>, if none entered, is 500ms.
6.2.31 AT+SIMTONE Generate Specifically Tone
AT+SIMTONE Generate Specifically Tone
Response
+SIMTONE: (0,1), (20-20000), (200-25500), (0,100-25500), (0-500000)
OK
Test Command
AT+SIMTONE
=?
Parameters
See Write Command.
Response
OK
ERROR
Write Command
AT+SIMTONE
=<mode>,<
frequency >,<
periodOn >,<
periodOff >[,<
duration >]
Parameters
<mode> 0 – Stop playing tone
1 – Start playing tone
<frequency > the frequency of tone to be generated
<periodOn> the period of generating tone, must be the multiple of 100
<periodOff> the period of stopping tone, must be the multiple of 100
<duration> duration of tones in milliseconds