Siemens Mux_guide_v06 manual Multiplexer close down CLD, Test command Test, Length field

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Multiplexer User's Guide

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Length field:

s

mobile

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

Bit 8

 

 

 

 

 

 

 

 

EA

L1

L2

L3

L4

L5

L6

L7

 

 

 

 

 

 

 

 

EA bit:

Extension bit.

 

 

 

 

 

 

In the last octet of the sequence the EA bit = 1, otherwise = 0.

 

 

 

If there is only one octet, EA bit = 1 is set.

 

 

 

L-bits:

Number of value octets; the following L1 is the LSB, L7 the MSB.

 

 

Multiple commands can be sent in a single frame only.

4.3.7 Multiplexer close down (CLD)

Type field:

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

Bit 8

 

 

 

 

 

 

 

 

1

C/R

0

0

0

0

1

1

 

 

 

 

 

 

 

 

Length byte = 0, no value octet

4.3.8 Test command (Test)

The test command is intended to test the connection between MS and TE.

Type field:

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

Bit 8

 

 

 

 

 

 

 

 

1

C/R

0

0

0

1

0

0

 

 

 

 

 

 

 

 

The length byte indicates the number of test bytes sent in the value bytes. The responding station should answer with exactly the same bit sequence. The test command is used for the version control. For more detailed information see Chapter 5.

Mux_guide_v06

Page 27 of 36

30.06.2004

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Contents Siemens Cellular Engines Version DocID Muxguidev06Muxguidev06 Document Name Multiplexer Users GuideMultiplexer Users Guide June 30Contents 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 Restrictions CharacteristicsIntegrating multiplexer into the customer application Basic requirementsFunctions without channel dependencies Timing conditions RTS/CTS on the physical channels Multiplexer control and signaling linesFlow control Logical flow controlCOM M COM N COM P RTS/CTS RTS/CTS on the logical channelsPower saving Bandwidth of logical channelsEscape sequence Structure of the multiplexer protocol Introduction of the multiplexer protocolData link layer Address field Flag sequenceFrame Type Control fieldBit Length indicatorInformation field Frame checking sequence field FCSState diagrams Relationship between the customer µC and the GSM engine µC AT+CMUX Serial Interface Customer GSM engineCustomer µC Serial interfaceResponder CustomerEngine GSM engineType field Close-down procedureDLC release Multiplexer control channelTest command Test Multiplexer close down CLDLength field Modem status command MSC Break signal optional Bit Not supported Value octet Length=1 Bit Power saving control PSCCommands Bit Description Type BitNo Value octet Length=0 Non-supported command response NSCValue octet Bit Command Type Non-supported commandAT+CMUX Customer GSM engine µCIntroduction Multiplexer protocol version controlMultiplexer protocol versions Modem status command MSCSignals Break Signals Octet Optional Command Bit Signals BitImplementing version control TroubleshootingExample of TestCommand message Coding of TestCommand message