TR TSY 000740 : ISSUE 3

1 Introduction
      1.1 Scope of Document
      1.2 Background Information on Traffic Measurements
      1.3 The Network Data Collection Operations System for
              Traffic Data Acquisition
      1.4 A Network Data Collection Operating System
2 Features and Capabilities
3 Interface Requirements
      3.1 Protocols
              3.1.1 Physical Level
              3.1.2 Link Level
              3.1.3 Packet Level
              3.1.4 Transport, Session, and Presentation Levels
              3.1.5 Application Level
                        3.1.5.1 Overview
                        3.1.5.2 NDC OS-to-SPCS Polling and
                                    Special Message Descriptions
                        3.1.5.3 SPCS-to-NDC OS Message Types
                        3.1.5.4 Message Priorities
                        3.1.5.5 NDC OS-to-SPCS Message Formats
                        3.1.5.6 SPCS-to-NDC OS Message Formats
                        3.1.5.7 SPCS-to-NDC OS Message Header Format
                        3.1.5.8 Data Section Format
                        3.1.5.9 Special Data Field Values
                        3.1.5.10 SPCS-to-NDC OS Message Sizes
      3.2 Interface Performance
              3.2.1 Availability
              3.2.2 Reliability
              3.2.3 Data Accuracy
              3.2.4 Data Link Capacity
      3.3 Interface Operations and Maintenance
              3.3.1 Initialization
              3.3.2 Examples of NDC OS Responses to Abnormal Events
Appendix A: SPCS-to-NDC OS Message Examples
References
Glossary
LIST OF TABLES
Table 3-1 Octet/Bit Order of Transmission for 16-Bit Measurements
Table 3-2 Octet/Bit Order of Transmission for 32-Bit Measurements
Table 3-3 NDC OS and NTM OS-to-SPCS Message Codes
Table 3-4 SPCS-to-NDC OS Message Codes
Table 3-5 Command and Response Codes for NDC OS-Originated Messages
Table 3-6 Command and Response Codes for NTM OS-Originated Messages
Table A-1 NDC OS Overall Header Example for Msg Type 103
Table A-2 SPCS-to-NDC OS Message - Data Section Worksheet Example
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