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Manuals and User Guides for Siemens AC45. We have
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Siemens AC45 manual available for free PDF download: User Manual
Siemens AC45 User Manual (36 pages)
Multiplexer User's Guide
Brand:
Siemens
| Category:
Cell Phone Accessories
| Size: 1.1 MB
Table of Contents
3
Table of Contents
5
Document History
6
1 Introduction
7
Supported Products and Related Documents
7
References
8
Term and Abbreviations
9
2 Multiplexer Protocol - an Overview
9
Product Concept and Architecture
9
Figure 1: Multiplexer Architecture
10
Virtual Channels and at Commands
10
Table 1: Comparison of Multiplexer Channels
11
3 Integrating Multiplexer Into the Customer Application
11
Characteristics
11
Basic Requirements
11
Restrictions
12
Dependencies Between Multiplexer Channels and Restrictions of Use
12
Functions Without Channel Dependencies
13
Timing Conditions
13
Operation of a Second Physical Serial Interface ASC1 (If Applicable)
14
Multiplexer Control and Signaling Lines
14
Flow Control
15
Figure 2: Logical Flow Control and RTS/CTS Signaling Behind the Decoder
16
Escape Sequence
16
Power Saving
16
Bandwidth of Logical Channels
17
4 Structure of the Multiplexer Protocol
17
Introduction of the Multiplexer Protocol
17
Data Link Layer
17
Figure 3: Data Link Layer
18
Address Field
18
Flag Sequence
18
Table 2: Address Field
18
Table 3: Assignment of the DLCI
18
Table 4: Use of the Command/Response Bit
19
Control Field
19
Table 5: Coding of the Control Field
20
Frame Checking Sequence Field (FCS)
20
Information Field
20
Length Indicator
21
State Diagrams
22
Figure 4: Relationship Between the Customer ΜC and the GSM Engine ΜC
23
Figure 5: MPI - Startup, DLC Establishment and Information Transfer
24
Figure 6: MP - DLC Release and Close Down
25
DLC Establishment
25
Figure 7: DLC Establishment
25
Figure 8: Information Transfer
25
Information Transfer
25
Start-Up Procedure
26
Close-Down Procedure
26
DLC Release
26
Figure 10: Multiplexer Control Channel
26
Figure 9: DLC Release
26
Multiplexer Control Channel
27
Multiplexer Close Down (CLD)
27
Test Command (Test)
28
Figure 11: Modem Status Command (MSC)
28
Modem Status Command (MSC)
30
Figure 12: Power Saving Control (PSC)
30
Power Saving Control (PSC)
31
Non-Supported Command Response (NSC)
32
Example: Establishing Logical Channels Without Parameter Negotiation
32
Figure 13: Establishing the Multiplexer Control Channel and the Logical Channel
33
5 Multiplexer Protocol Version Control
33
Introduction
34
Multiplexer Protocol Versions
34
Figure 14: MSC As Used in Version 3
34
Table 6: Version Differences for MSC
35
Implementing Version Control
35
Troubleshooting
36
Coding of "Testcommand" Message
36
Example of "Testcommand" Message
36
Table 7: IEI Coding
36
Table 8: Coding of "Testcommand" (Example)
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