MIL-STD-188-172 Base Document:1989

1 SCOPE
    1.1 Purpose
    1.2 Scope
    1.3 Application
    1.4 System standards and design objectives
    1.5 Tailoring
2 APPLICABLE DOCUMENTS
    2.1 Government documents
    2.1.1 Standards
    2.2 Order of precedence
    2.3 Source of documents
3 DEFINITIONS
    3.1 Definitions of terms
    3.1.1 Character set
    3.1.2 Data rate
    3.1.3 Intercharacter interval
    3.1.4 Mode I
    3.1.5 Mode II
    3.1.6 Mode V
    3.1.7 Mode VI
    3.1.8 Mode VII
    3.2 Definitions of abbreviations and acronyms
4 GENERAL REQUIREMENTS
    4.1 Mode II channel coordination procedure
    4.2 Duplex operation
    4.3 Character codes
    4.3.1 CONUS eight-bit character code
    4.3.2 OCONUS eight-bit character code
    4.3.3 IA No 2
    4.4 Character transmission
    4.5 Message format
5 DETAILED REQUIREMENTS
    5.1 Mode II channel coordination procedure
    5.2 Character codes
    5.2.1 Eight-bit coded environment
    5.2.2 IA No 2 code
    5.3 Character structure
    5.3.1 Eight-bit coded environment
    5.3.1.1 Ten-bit structure
    5.3.1.2 Eleven-bit structure
    5.3.2 IA No 2
    5.3.2.1 Seven-bit structure
    5.3.2.2 Eight-bit structure
    5.4 Message framing and control
    5.4.1 SOM sequence
    5.4.1.1 IA No 2
    5.4.2 EOM sequence
    5.4.3 CANTRANS sequence
6 NOTES
    6.1 Mode II throughput calculations
    6.1.1 Example
    6.1.2 Tabulated transmission times
    6.2 Key word listing
FIGURES
1 Mode II data codes-eight bit coded environment
2 Mode II data codes - IA No 2
3 Mode II, seven-bit IA No 2 code-transmission
    sequence for SOM
4 Mode II, seven-bit IA No 2 code-transmission
    sequence for EOM
5 Mode II, seven-bit IA No 2 code-transmission
    sequence for CANTRANS
TABLES
Table I Mode II CONUS eight-bit character set-odd
         number of logical 1 bits per character
Table II Mode II OCONUS eight-bit character set-even
         number of logical 1 bits per character
Table III International Alphabet No 2 (1A No 2) -
           American version
Table IV Mode II transmission in time in seconds for a
           6900 character message
Appendixes
Appendix A DEPARTMENT OF DEFENSE DIRECTIVE 4640.11: 21
            DECEMBER 1987: SUBJECT: MANDATORY USE OF
            MILITARY TELECOMMUNICATIONS STANDARDS IN THE
            MIL-STD-188 SERIES
Appendix B LIST OF ABBREVIATIONS AND ACRONYMS USED IN
            MIL-STD-188-172







  

Ensures interoperability and to promote commonality of communications equipment and subsystems using the Mode II channel coordination procedure.