TR TSY 000854 : ISSUE 1 SUPP 1

1 INTRODUCTION
1.1 Definition
1.2 Background
1.3 High-Level Feature Description
2 USER PERSPECTIVE
3 FEATURE REQUIREMENTS
3.1 Feature Operations
3.1.1 MAIN FEATURE OPERATIONS
3.1.1.1 ISDN Call Pickup (I-CPU)
3.1.1.2 ISDN Directed Call Pickup - NonBarge-In (I-DPN)
3.1.1.3 ISDN Directed Call Pickup - Barge-In (I-DPU)
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
3.3.2 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 GLOSSARY
5 REFERENCES
LIST OF FIGURES
Figure 1 User to Network SETUP Message
Figure 2 User to Network INFOrmation Message
Figure 3 Network to User CALL PROCeeding Message
Figure 4 Network to User INFOrmation Message
Figure 5 INFOrmation Message Containing the Null Call
                Reference
Figure 6 DISConnect, RELease, or RELease COMplete Message