Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 167)

Serial Port Commands
Multiplexing Mode +CMUX
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WM_DEV_OAT_UGD_049 - 001 VOLUME 1 August 23, 2007
8.13 Multiplexing Mode +CMUX
8.13.1 Description
This command is used to manage (enable or disable) the 3GPP TS 27.010 [14]
multiplexing protocol control channel.
This command allows the multiplexing of 4 logical channels on a single UART. Two
UARTs are available on the Wavecom Wireless CPU ® s, but multiplexing can only
apply to one. The client application may handle, by this means, up to 5 channels (4
logical multiplexed channels on an UART and 1 physical channel on the other UART).
When a CMUX session is enabled, the Wavecom Wireless CPU ® allows to open 4
DLCs. These DLCs can be in the range of 1 to 4. This excludes DLC0 which is for the
control channel.
8.13.2 Syntax
Action command
AT+CMUX=<mode>[,<subset>[,<port_speed>[,<N1>[,<T1>[,<N2>[,<T2>[,
<T3>]]]]]]]
OK
Read command
AT+CMUX?
+CMUX: <mode>,<subset>,<port_speed>,<N1>,<T1>,<N2>,<T2>,<T3>
OK
Test command
AT+CMUX=?
+CMUX: (list of supported <mode>s),(list of supported
<subset>s),(list of supported <port_speed>s),(list of supported
<N1>s),(list of supported <T1>s),(list of supported <N2>s),(list
of supported <T2>s),(list of supported <T3>s)
OK