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Table Of Contents - Siemens Mux_guide_v06 User Manual

Multiplexer user's guide
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Multiplexer User's Guide
Confidential / Released
Contents
0
Document history..........................................................................................................5
1
Introduction ...................................................................................................................6
1.1
Supported products and related documents..........................................................7
1.2
References ............................................................................................................7
1.3
Term and abbreviations .........................................................................................8
2
Multiplexer protocol - an overview .............................................................................9
2.1
Product concept and architecture ..........................................................................9
2.2
Virtual channels and AT commands ....................................................................10
3
Integrating multiplexer into the customer application ............................................11
3.1
Characteristics .....................................................................................................11
3.1.1
Basic requirements ................................................................................11
3.1.2
Restrictions ............................................................................................11
3.1.3
3.1.4
Functions without channel dependencies ..............................................12
3.1.5
Timing conditions ...................................................................................13
3.1.6
3.2
Multiplexer control and signaling lines .................................................................14
3.2.1
Flow control............................................................................................14
3.2.2
Escape sequence ..................................................................................16
3.3
Power saving .......................................................................................................16
3.4
Bandwidth of logical channels .............................................................................16
4
Structure of the multiplexer protocol........................................................................17
4.1
Introduction of the multiplexer protocol................................................................17
4.2
Data link layer ......................................................................................................17
4.2.1
Flag sequence .......................................................................................18
4.2.2
Address field ..........................................................................................18
4.2.3
Control field............................................................................................19
4.2.4
Length indicator .....................................................................................20
4.2.5
Information field .....................................................................................20
4.2.6
Frame checking sequence field (FCS)...................................................20
4.3
State diagrams.....................................................................................................21
4.3.1
Start-up procedure .................................................................................25
4.3.2
DLC establishment.................................................................................25
4.3.3
Information transfer................................................................................25
4.3.4
DLC release ...........................................................................................26
4.3.5
Close-down procedure...........................................................................26
4.3.6
Multiplexer control channel ....................................................................26
4.3.7
Multiplexer close down (CLD) ................................................................27
4.3.8
Test command (Test).............................................................................27
4.3.9
Modem status command (MSC) ............................................................28
4.3.10
Power saving control (PSC)...................................................................30
4.3.11
Non-supported command response (NSC)............................................31
4.4
Mux_guide_v06
Page 3 of 36
s
m
o b i l e
30.06.2004

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