TR TSY 000855 : ISSUE 1 SUPP 1

1 INTRODUCTION
1.1 Definition
1.2 Background
1.3 High-Level Feature Description
1.3.1 ACB-I OPTIONS
1.3.2 ACB-I PARAMETERS
2 USER PERSPECTIVE
2.1 Called User
2.2 Calling User
3 FEATURE REQUIREMENTS
3.1 Feature Operations
3.1.1 MAIN FEATURE OPERATIONS
3.1.2 OTHER FEATURE OPERATIONS
3.1.3 RELEASE TREATMENT
3.1.4 FEATURE OPERATION INTERWORKING
3.1.5 ERROR TREATMENT AND ABNORMAL EVENTS
3.2 Internal Call-Processing Controls
3.2.1 CLASS OF SERVICE CONFIGURATION
3.2.2 CODE INTERPRETATION
3.2.3 SCREENING
3.2.4 ROUTING
3.2.5 CHARGE TREATMENT DETERMINATION
3.2.6 OVERLOAD
3.3 Signaling/Message Structure
3.3.1 CUSTOMER SIGNALING/USER-NETWORK INTERFACE
3.3.1.1 Feature Deactivation
3.3.1.2 Message Structure
3.3.2 SS7 INTERFACE SIGNALING
3.3.3 INTERWORKING WITH OTHER SIGNALING SYSTEMS
3.3.4 OPERATOR SERVICE SIGNALING
3.4 Administration
3.4.1 SERVICE CHANGES/SUBSCRIPTION PARAMETERS
3.4.2 TRAFFIC MEASUREMENTS
3.4.3 MAINTENANCE MEASUREMENTS
3.4.4 BILLING AND COMPTROLLER
3.5 Interactions
3.6 Limitations And Restrictions
3.7 Timing And Tolerances
4 LINE DIAGRAMS
5 GLOSSARY
6 REFERENCES
LIST OF FIGURES
Figure 1 Request for ACB-I Activation/Deactivation/
             Acceptance of Offered Call Establishment
Figure 2 Call-Reference Clearing and Acknowledgement of
             Activation/Deactivation/Rejection
Figure 3 Call-Reference Clearing and Acknowledgement of
             Activation/Deactivation/Rejection
Figure 4 Carrying Information or Request to the Switch
Figure 5 Acknowledgement of User Request, Request for
             Information, or Tone Control
Figure 6 Notification to ACB-I Subscriber
Figure 7 Acknowledgement of the Use of Overlap Sending
Figure 8 CALL PROCeeding Message Content
Figure 9 PROGress Message Content

Contains Bellcore's proposed generic requirements for ISDN Automatic Callback (ACB I). The ACB I feature allows the determination of busy/idle status of a called user and report a change in status. ACB I is assignable for ISDN users on a per directory number/call type and per directory number/call type/terminal basis. This feature applies only for circuit mode call types.