Siemens MC55 manual AT+CMUX Enter multiplex mode, At+Cmux=?, At+Cmux?, +CMUX mode, AT+CMUX=mode

MC55 AT Command Set

4.8 AT+CMUX

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4.8AT+CMUX Enter multiplex mode

Syntax

Test Command

AT+CMUX=?

Response(s)

+CMUX: (list of supported<mode>s)

OK

Read Command

AT+CMUX?

Response(s)

+CMUX: <mode>

OK ERROR

+CME ERROR: <err>

Write Command

AT+CMUX=<mode>

Response(s)

OK ERROR

+CME ERROR: <err>

PIN ASC0 ASC1 MUX1 MUX2 MUX3

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Reference(s)

GSM 07.07, GSM 07.10

Command Description

All information provided in this chapter applies to the ASC0 interface only. The second interface ASC1 has no support of Multiplex mode.

Multiplex mode according to the ETSI TS 101 669 and GSM 07.10 enables one physical serial asynchronous interface to be partitioned into three virtual channels. This allows you to take advantage of up to 3 simultaneous sessions running on the serial interface. For example, you can send or receive data or make a call on the first channel, while the other two channels are free to control the module with AT commands.

The MC55 module incorporates an internal multiplexer and thus integrates all the functions needed to implement full-featured multiplex solutions. For the application on top, customers have the flexibility to create their own mul- tiplex programs conforming to the multiplexer protocol. To help system integrators save the time and expense of designing multiplexer applications, SIEMENS AG offers WinMUX2k, a ready-to-use multiplex driver for Windows 2000 and Windows XP. Another approach is to develop customized solutions based on the sources of the WinMux2k driver.

MC55_ATC_V01.05	Page 99 of 469	2/10/04
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