Siemens Mux_guide_v06 Non-supported command response NSC, No Value octet Length=0, Type field Bit

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Multiplexer User's Guide

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s

mobile

No Value octet (Length=0)

Switches into SLEEP mode, like AT+CFUN=0

Note:

According to the GSM 07.10 standard PSC supports no value octets. The optional value octet was added to increase flexibility.

Developed as a substitute to the AT+CFUN command, PSC messages are recommended to control the various SLEEP modes and to reset the mobile. Be sure not to enter any PSC messages until after all responses to AT commands have been received and, in the case of a received URC, the logical ring line has been activated for 1 second and deactivated again. Please note that the behavior of the logical ring line is identical with the behavior of the physical RING0 line described in [1].

4.3.11 Non-supported command response (NSC)

This response is sent whenever a command type is not supported by the receiving entity.

Type field:

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

 

Bit 8

1

C/R

0

0

1

0

0

 

0

C/R bit:

Indicates whether the sequence is a command or a response.

 

 

 

Value octet:

 

 

 

 

 

 

 

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

 

Bit 8

EA

C/R

 

Command

type of the

non-supported command

 

C/R bit: Returns the same value as in the received, non-supported command

Frames not recognized by the receiving entity are responded by a NSC-frame.

Mux_guide_v06

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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 channelsBandwidth of logical channels Power savingEscape sequence Introduction of the multiplexer protocol Structure 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 channelMultiplexer close down CLD Test command TestLength 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