Siemens Mux_guide_v06 - Manual (Page 4)

Multiplexer User's Guide
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Mux_guide_v06 Page 4 of 36 30.06.2004
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