TR TSY 000857 : ISSUE 1 SUPP 1

1 INTRODUCTION
1.1 Definition
1.2 Background
1.3 High-Level Feature Description
2 USER PERSPECTIVE
2.1 Calling User
2.2 Called User
2.3 Remote User
3 FEATURE REQUIREMENTS
3.1 Feature Operations
3.1.1 MAIN FEATURE OPERATIONS
3.1.1.1 ACO Operations
3.1.1.2 Interactions of ACO with ISDN Hold Capability
3.1.2 OTHER FEATURE OPERATIONS
3.1.2.1 Examples of ACO Operation
3.1.2.2 Provision of ISDN Equivalents of Conventional
              Call Waiting Features
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 SERVICES SIGNALING
3.4 Administration
3.4.1 SERVICES 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 Additional Call Notification
Figure 2 Response to Additional Call Notification (1 of 3)
Figure 3 Response to Additional Call Notification (2 of 3)
Figure 4 Response to Additional Call Notification (3 of 3)
Figure 5 Acceptance of Channel Selection
Figure 6 Acceptance of Channel Selection, Alternative for
              Packet-Mode
Figure 7 Request to hold a party
Figure 8 Acknowledgement of request to hold a party
Figure 9 Attempt to Retrieve a Held Party
Figure 10 Acknowledgement of Request to Retrieve a
              Held Party
Figure 11 Rejection of Request to Retrieve Call
Figure 12 Rejection of Request to Hold Call
Figure 13 Request for Dial Call Waiting
Figure 14 Acknowledgement of the Use of Overlap Sending
Figure 15 CALL PROCeeding message content
Figure 16 Sending Information to the Switch
Figure 17 Request for Address Information or Tone Control