Siemens Mux_guide_v06 manual Tables, Multiplexer protocol version control

Page 4

Multiplexer User's Guide

Confidential / Released

s

mobile

5

Multiplexer protocol version control

33

 

5.1

Introduction

33

 

5.2

Multiplexer protocol versions

34

 

5.3

Implementing version control

35

 

 

5.3.1 Troubleshooting

35

 

 

5.3.2 Coding of “TestCommand” message

36

 

 

5.3.3 Example of “TestCommand” message

36

Figures

Figure 1: Multiplexer architecture

9

Figure 2: Logical flow control and RTS/CTS signaling behind the decoder

15

Figure 3: Data link layer

17

Figure 4: Relationship between the customer µC and the GSM engine µC

22

Figure 5: MPI – Startup, DLC establishment and information transfer

23

Figure 6: MP - DLC release and close down

24

Figure 7: DLC establishment

25

Figure 8: Information transfer

25

Figure 9: DLC release

26

Figure 10: Multiplexer control channel

26

Figure 11: Modem status command (MSC)

28

Figure 12: Power Saving Control (PSC)

30

Figure 13: Establishing the multiplexer control channel and the logical channel

32

Figure 14: MSC as used in version 3

34

Tables

Table 1: Comparison of multiplexer channels

10

Table 2: Address field

18

Table 3: Assignment of the DLCI

18

Table 4: Use of the command/response bit

18

Table 5: Coding of the control field

19

Table 6: Version differences for MSC

34

Table 7: IEI coding

36

Table 8: Coding of “TestCommand” (Example)

36

Mux_guide_v06

Page 4 of 36

30.06.2004

Image 4
Contents Version DocID Muxguidev06 Siemens Cellular EnginesDocument Name Multiplexer Users Guide Multiplexer Users GuideJune 30 Muxguidev06Contents Tables Multiplexer protocol version controlChapter What is new Document historyIntroduction Supported products and related documents ReferencesTerm and abbreviations Abbreviation DescriptionMultiplexer protocol an overview Product concept and architectureVirtual channels and AT commands Characteristics Integrating multiplexer into the customer applicationBasic requirements RestrictionsFunctions without channel dependencies Timing conditions Multiplexer control and signaling lines Flow controlLogical flow control RTS/CTS on the physical channelsRTS/CTS on the logical channels COM M COM N COM P RTS/CTSBandwidth of logical channels Power savingEscape sequence Introduction of the multiplexer protocol Structure of the multiplexer protocolData link layer Flag sequence Address fieldControl field Frame TypeLength indicator Information fieldFrame checking sequence field FCS BitState diagrams Relationship between the customer µC and the GSM engine µC Serial Interface Customer GSM engine AT+CMUXSerial interface Customer µCCustomer EngineGSM engine ResponderClose-down procedure DLC releaseMultiplexer control channel Type fieldMultiplexer close down CLD Test command TestLength field Modem status command MSC Break signal optional Bit Not supported Power saving control PSC Commands Bit DescriptionType Bit Value octet Length=1 BitNon-supported command response NSC Value octet Bit Command TypeNon-supported command No Value octet Length=0Customer GSM engine µC AT+CMUXMultiplexer protocol version control IntroductionModem status command MSC Signals Break Signals Octet Optional Command BitSignals Bit Multiplexer protocol versionsTroubleshooting Implementing version controlCoding of TestCommand message Example of TestCommand message