Manual

Smart Machine Smart Decision
SIM800 Series_AT Command Manual_V1.09 96 2015-08-03
whose duration is determined by <duration>.
<duration> Duration of the tone in 1/10 seconds range :1-255
Parameter Saving
Mode
NO_SAVE
Max Response
Time
Number of DTMF characters*duration.
Reference
3GPP TS 27.007
[13]
Note
3.2.38 AT+CMUX Multiplexer Control
AT+CMUX Multiplexer Control
Response
+CMUX: (0)
OK
Test Command
AT+CMUX=?
Parameters
See Write Command
Response:
+CMUX:[<mode>[,<subset>[,<port_speed>[,<N1>[,<T1>[,<N2>[,<T2
>[,<T3>[,<k>]]]]]]]]]
OK
ERROR
Read Command
AT+CMUX?
Parameters
<mode> Multiplexer transparency mechanism
0 Basic option
<subset> The way in which the multiplexer control channel is set up
0 UIH frames used only
<port_speed> Transmission rate
1 9600 bits/t
2 19200 bits/t
3 38400 bits/t
4 57600 bits/t
5 115200 bit/s
6 230400 bits/t
7 460800 bits/t
Proprietary values, available if MUX NEW PORT
SPEED FTR is activated
<N1> Maximum frame size
1-255 Default: 127
<T1> Acknowledgement timer in units of ten milliseconds
1-255 Default:10 (100 ms)