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OnCell G2150I AT Command Set General Commands
3-14
Command Possible responses
AT+CMUX=?
Note: Get possible values
MUX: (0),(0),(1-5),(1-255),(1-128),(0-255),(1-128),(1-128)
OK
AT+CMU X?
Note: Get current values
+CMUX:<mode>,<subset>,<port_speed>,<N1>,<T1>,<N2
>,<T2>,<T3>
OK
or
+CME ERROR: <err>
AT+CMUX=<mode>[,<subset>[,<
port_speed>[,<N1>[,<T1>[,<N2>[
,<T2>[,<T3>]]]]]]]
Note: enter multiplex mode
OK
or
+CME ERROR: <err>
Defined values:
<mode> multiplexer Transparency Mechanism
0: Basic option
<subset> This parameter defines the multiplexer control channel setup. A virtual channel may
subsequently be set up differently but if there is no settings negotiation, the virtual
channel will be set up according to the control channel <subset> setting.
0: UIH frames used only
<port_speed> transmission rate
1: 9600 bit/s
2: 19200 bit/s
3: 38400 bit/s
4: 57600 bit/s
5: 115200 bit/s
Note:
• If port speed is not configured by the at+CMUX command, the current
<port_speed> is the same as that displayed by at+ipr? command.
• If port speed is configured by the AT+CMUX command, the AT+CMUX port
speed setting is erasing the AT+IPR port speed
• At the end of the CMUX, the <port_speed> displayed is the same as that
displayed by the at+ipr? command.
<N1> Maximum Frame Size
1-255
Default Value: 31
<T1> acknowledgement timer in units of 20 ms.
1-128 (1 unit <->20 ms).
Default Value: 5 (100 ms)
<N2> Maximum number of retransmission
0-255
Default Value: 3
<T2> response timer for the multiplexer control channel in units of 20 ms.
1-128 (1 unit <->20 ms).
Default Value: 15 (300 ms)
NOTE: <T2> must be longer than <T1>
<T3> wake up response timer in units of 2 seconds
1-128 (1 unit <->2 s).
Default Value: 5 (10 s)