Siemens Mux_guide_v06 manual Break signal optional Bit Not supported

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Multiplexer User's Guide

Confidential / Released

s

mobile

Note:

The mappings are valid for version 3 and an MSC request only. Descriptions of all other versions are available in Chapter 5.

The response to any MSC must be always the same data already sent. Please keep in mind that it is impossible to remap any response bits.

Remember that the bits described above are valid in Mux version 3 only, switched on by a version control handshake (see Chapter 5). More detailed information on older multiplexer versions are available in Chapter 5.2.

Break signal (optional):

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

Bit 8

1

 

 

 

Not supported

 

 

Usually the break signal octet carries information about a break condition detected from the host application in the data stream for the DLC.

Note:

This command supports no parameters. Instead we use this optional parameter to transport the escape sequence detection from the host to the module. If the customer application detects an escape sequence (usually +++), it sends this optional octet with bit 1 set to 1. The module calls its original escape sequence.

Mux_guide_v06

Page 29 of 36

30.06.2004

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Contents Siemens Cellular Engines Version DocID Muxguidev06Multiplexer Users Guide Document Name Multiplexer Users GuideJune 30 Muxguidev06Contents Multiplexer protocol version control TablesDocument history Chapter What is newIntroduction References Supported products and related documentsAbbreviation Description Term and abbreviationsProduct concept and architecture Multiplexer protocol an overviewVirtual channels and AT commands Integrating multiplexer into the customer application CharacteristicsBasic requirements RestrictionsFunctions without channel dependencies Timing conditions Flow control Multiplexer control and signaling linesLogical flow control RTS/CTS on the physical channelsCOM M COM N COM P RTS/CTS RTS/CTS on the logical channelsEscape sequence Power savingBandwidth of logical channels Data link layer Structure of the multiplexer protocolIntroduction of the multiplexer protocol Address field Flag sequenceFrame Type Control fieldInformation field Length indicatorFrame checking sequence field FCS BitState diagrams Relationship between the customer µC and the GSM engine µC AT+CMUX Serial Interface Customer GSM engineCustomer µC Serial interfaceEngine CustomerGSM engine ResponderDLC release Close-down procedureMultiplexer control channel Type fieldLength field Test command TestMultiplexer close down CLD Modem status command MSC Break signal optional Bit Not supported Commands Bit Description Power saving control PSCType Bit Value octet Length=1 BitValue octet Bit Command Type Non-supported command response NSCNon-supported command No Value octet Length=0AT+CMUX Customer GSM engine µCIntroduction Multiplexer protocol version controlSignals Break Signals Octet Optional Command Bit Modem status command MSCSignals Bit Multiplexer protocol versionsImplementing version control TroubleshootingExample of TestCommand message Coding of TestCommand message