Contents. 1 Introduction. 2 AMA Process Model and Key Terminology. 3 AMA Data Generation

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1 1 Introduction 1.1 Reasons for GR-508-CORE, Issue Reasons for GR-508-CORE, Issue Purpose and Scope Structure and Use of This Document Requirements Terminology Requirement Labeling Conventions Numbering of Requirement and Related Objects Requirement, Conditional Requirement, and Objective Identification AMA Process Model and Key Terminology 2.1 AMA Process Model Billing AMA Format (BAF) BAF-Related Terms Call-Related Terms AMA Data Generation 3.1 AMA Translations Line or Trunk Attributes Directory Number and Billing Number Services and Features LEC-Settable Office Parameters Local Calling Area Tariff-Implementation Parameters Message-Rate Call Types Toll Calls LEC-Settable BAF Fields for Service Features and Call Types Fundamentals of AMA Data Generation Factors Affecting AMA Data Generation Line or Trunk Attributes Digits Dialed Features Invoked LEC-Settable Office Parameters Non-Switch-Based Control Route Selected Call Disposition Long Duration Connection Tariff-Implementation Parameters Operator Services IC/INC Interconnection Unanswered Call Recording Impact of AMA-Related Failures on Calls AMA Data Generated for Studies v

2 3.3.1 AMA Fundamentals for Studies AMA Data Generated for Specific Studies Complaint Observing Subscriber Line Usage Study (SLUS) Network Completion Test Capability for AMA Data Generation Validation Testing Free Termination Service Lines Considerations Regarding Network Arrangements Directory Assistance Service Other Listing Services INWATS and Toll-Free (8YY) Calls Billing AMA Format (BAF) 5 AMA Data Retention 5.1 Minimum Retention Time AMA Data Retention Methodology AMA Data Output 6.1 AMA Data Networking AMA Teleprocessing Removable Hardcopy Recording Characteristics of Removable Media AMA Data Set Conventions AMA Tape Blocks Logical Data Set (LDS) Data Set Physical Data Set Tape Label and Label Handling Conventions Volume and Data Set Labels User Labels AMA Data Loss When Outputting Abnormally Ended Hardcopy Media Central Office Technician Operations AMA Data Integrity 7.1 Scope Approach Near-Real-Time AMA Function Generate Data Subfunction Metrics Requirements Example Requirement Applications Aggregation/Correlation Subfunction Metrics Format BAF Record Subfunction Metrics vi

3 7.3.4 Form AMA File Subfunction Metrics AMA Output Function AMA Data Networking AMA Teleprocessing Local Hardcopy Recording Resetting Counts AMA Maintenance Hourly AMA Audit Records Descriptions of AMA Call Counts Relationship of OTGR Definitions to SC Impact of Time-of-Day Clock Adjustments Additional Audit Records Time Change Audit Record Overflow Audit Record Software Change Audit Record AMA Timing 8.1 AMA Timing Concepts Detection of Changes in Supervisory States Call Events Call Connect Carrier Connect Disconnect Answer Unanswered Types of Connections Conventional Connection Long Duration Connection Early On-Hook Connection Conventional Connection Processing Duration Time Determination Duration Time Clock Determinate and Variable Errors and Delays Time-of-Day Determination Time-of-Day Clock Time-of-Day Clock Changes and Adjustments Time-of-Day Adjustments and Time Stamps Date Determination Long Duration Connection Processing Intranetwork Calls Internetwork Calls Time Changes That Span Record Generation Time Early On-Hook Connection Processing Timing Irregularity Condition Processing Intranetwork Calls Internetwork Calls vii

4 8.5.3 Example Timing Irregularity Conditions BAF Timing Indicator Fields Timing Indicator - Table Called Party Off-Hook Indicator - Table AMA Reliability and Quality 9.1 Background AMA Design and Architecture Overall AMA Function BAF-Record Generation Accuracy Hardware Reliability Software Reliability and Quality Additional Reliability and Quality Requirements Miscellaneous AMA Requirements 10.1 AMA Testing Hardware Tests Software Tests AMA Data Field Tests AMA Timing Tests AMA Test Tapes Purpose of AMA Test Tapes of the AMA Test Tape AMA Test Tape Documentation AMA Test Tape Scheduling AMA Data Display Security of Data Display Data Display Characteristics Test Capability for AMA Data Generation In-Service Performance Monitoring Overview Vendor's Program LEC's Program Vendor Support Documentation Training Appendix A: Testing Conformance to the BAF-Record Generation Accuracy Requirement A.1 Hypothesis Test A 1 A.2 Field Performance Data A 2 viii

5 Appendix B: References Appendix C: Acronyms and Special Terms Requirement-Object Index ix

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7 List of Figures List of Figures Figure 2-1 AMA Process Model Figure 6-1 AMA Tape Organization (Data Set on Single Volume) Figure 6-2 AMA Tape Block Figure 6-3 AMA Logical Data Set Figure 6-4 Physical Data Set Figure 6-5 Layout of the Physical Data Set for a Single Volume Data Set Figure 6-6 Example of Physical Data Sets for a Multiple Volume Data Set Figure 6-7 AMA Tape Organization Figure 7-1 AMA Process Model Figure 7-2 High-Level AMA Reporting View Figure 7-3 Near-Real-Time AMA Function Figure 7-4 Event Count Locations Figure 7-5 Local Hardcopy Recording Subfunction Figure 8-1 Components of Variable Inaccuracy in Duration Timing Figure 8-2 Long Duration Connection Record Generation Figure 8-3 Early On-Hook Connection (Calling Party On-Hook) Figure 8-4 Early On-Hook Connection (Called Party On-Hook) Figure 8-5 Early On-Hook Connection Figure 8-6 Early On-Hook Connection (Called Party On-Hook) with Timed Release Disconnect Timing Figure 8-7 Timing Irregularity (Call Connect Time Unobserved) Figure 8-8 Timing Irregularity (Call Disconnect Time Unobserved) xi

8 List of Figures xii

9 List of Tables List of Tables Table 3-1 Message-Rate Call Type Code Conditions Table 7-1 Impact of Example Designs and Call Scenarios on Counts Table 7-2 Alarm Levels for Aggregation/Correlation Table 7-3 Count Types and Accumulation Intervals Table A-1 Maximum Mis-produced BAF Records as a Function of Total BAF Records A 1 Table A-2 Field Performance Data A 2 xiii