Data Sheet

Smart Machine Smart Decision
SIM800 Series_AT Command Manual_V1.09 97 2015-08-03
<N2> Maximum number of re-transmissions
0-100 Default:3
<T2> Max Response Timer for the multiplexer control channel in
units of ten milliseconds
2-255 Default:30
<T3> Wake up Max Response Timers in seconds
1-255 Default:10
<k> Window size, for Advanced operation with Error Recovery
options
1-7 Default:2
Response
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CMUX=<mo
de>
Parameters
<mode> Multiplexer transparency mechanism
0 Basic option
Parameter Saving
Mode
NO_SAVE
Max Response
Time
-
Reference
3GPP TS 27.007
[13]
Note
The multiplexing transmission rate is according to the current serial baud
rate. It is recommended to enable multiplexing protocol under 115200
bit/s baud rate
Multiplexer control channels are listed as follows:
Channel Number Type DLCI
None Multiplexer Control 0
1 3GPP TS 27.007 and 005 1
2 3GPP TS 27.007 and 005 2
3 3GPP TS 27.007 and 005 3
4 3GPP TS 27.007 and 005 4
3.2.39 AT+CNUM Subscriber Number
AT+CNUM Subscriber Number
Test Command
AT+CNUM=?
Response
OK
Execution
Command
AT+CNUM
Response
+CNUM: [<alpha1>],<number1>,<type1>[,<speed>,<service>]
[<CR><LF>+CNUM:[<alpha2>],<number2>,<type2>[,<speed>,<serv
ice>]
[...]]