Version DocID Muxguidev06 | Siemens Mux_guide_v06 instruction

Multiplexer User's Guide

Siemens Cellular Engines

Version: 06

DocID: Mux_guide_v06

User’s Guide

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Siemens Mux_guide_v06 manual Version DocID Muxguidev06, Siemens Cellular Engines

Contents

Siemens Cellular Engines Version DocID Muxguidev06 Multiplexer Users Guide Document Name Multiplexer Users GuideJune 30 Muxguidev06 Contents Multiplexer protocol version control Tables Document history Chapter What is new Introduction References Supported products and related documents Abbreviation Description Term and abbreviations Product concept and architecture Multiplexer protocol an overview Virtual channels and AT commands Integrating multiplexer into the customer application CharacteristicsBasic requirements Restrictions Functions without channel dependencies Timing conditions Flow control Multiplexer control and signaling linesLogical flow control RTS/CTS on the physical channels COM M COM N COM P RTS/CTS RTS/CTS on the logical channels Bandwidth of logical channels Power savingEscape sequence Introduction of the multiplexer protocol Structure of the multiplexer protocolData link layer Address field Flag sequence Frame Type Control field Information field Length indicatorFrame checking sequence field FCS Bit State diagrams Relationship between the customer µC and the GSM engine µC AT+CMUX Serial Interface Customer GSM engine Customer µC Serial interface Engine CustomerGSM engine Responder DLC release Close-down procedureMultiplexer control channel Type field Multiplexer close down CLD Test command TestLength field Modem status command MSC Break signal optional Bit Not supported Commands Bit Description Power saving control PSCType Bit Value octet Length=1 Bit Value octet Bit Command Type Non-supported command response NSCNon-supported command No Value octet Length=0 AT+CMUX Customer GSM engine µC Introduction Multiplexer protocol version control Signals Break Signals Octet Optional Command Bit Modem status command MSCSignals Bit Multiplexer protocol versions Implementing version control Troubleshooting Example of TestCommand message Coding of TestCommand message