MIL-STD-187-721D
TABLE OF CONTENTS
1. SCOPE ....................................................................................................................................1
1.1 Scope. ................................................................................................................................1
1.2 Applicability. ......................................................................................................................1
1.3 Application guidance. .........................................................................................................1
2. APPLICABLE DOCUMENTS ................................................................................................2
2.1 General...............................................................................................................................2
2.2 Government documents......................................................................................................2
2.2.1 Specifications, standards, and handbooks. ....................................................................2
2.2.2 Other Government documents, drawings, and publications...........................................2
2.3 Non-Government publications. ...........................................................................................2
2.4 Order of precedence. ..........................................................................................................3
3. DEFINITIONS ........................................................................................................................3
3.1 Terms.................................................................................................................................3
3.2 Abbreviations and acronyms. ..............................................................................................3
3.3 Timing symbols. .................................................................................................................5
3.4 ALQA mathematical expressions. .......................................................................................5
4. GENERAL REQUIREMENTS................................................................................................6
4.1 Data link sublayers..............................................................................................................6
4.2 Linking protection. .............................................................................................................6
4.3 Time of day (TOD) synchronization....................................................................................6
4.4 Link quality functions. ........................................................................................................7
4.4.1 Passive LQA................................................................................................................7
4.4.2 Polling. ........................................................................................................................7
4.4.3 LQA reporting.............................................................................................................7
4.5 Advanced link quality analysis (ALQA) function.................................................................8
4.5.1 Channel quality measures.............................................................................................8
4.5.2 Link performance measures..........................................................................................9
4.5.3 ALQA histogramming..................................................................................................9
4.5.3.1 Exceedance distributions.......................................................................................9
4.5.3.2 Integrating periods................................................................................................9
4.5.3.3 Histogram generation............................................................................................10
4.5.4 Link quality prediction programs..................................................................................12
4.6 Networking functions. ........................................................................................................12
4.7 Interface to link controllers.................................................................................................12
4.8 Network management.........................................................................................................12
4.9 Multi-media networks.........................................................................................................12
4.10 New ALE or orderwire functions......................................................................................12
4.11 Automatic link maintenance..............................................................................................14
4.11.1 Link quality monitoring..............................................................................................14
4.11.2 Frequency negotiation................................................................................................14
4.11.3 Automatic power control. ..........................................................................................14
4.12 Advanced automatic link establishment. ............................................................................14
4.13 System parameters by address...........................................................................................14
4.14 HF e-mail. ........................................................................................................................15
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