TR TSY 000853 : ISSUE 1 REV 1

1. INTRODUCTION
1.1 Definition
1.2 Background
1.3 High-Level Feature Description
2. USER PERSPECTIVE
2.1 User At The Base DN
2.2 User At The Originating DN
2.3 User At The Remote DN
3. FEATURE REQUIREMENTS
3.1 Feature Operations
3.1.1 MAIN FEATURE OPERATIONS
3.1.1.1 Circuit-Mode Activation
3.1.1.2 Circuit-Mode Deactivation
3.1.1.3 Packet-Mode Activation and Deactivation
3.1.1.4 Forwarding a Call
3.1.1.5 Conditions on Forwarding
3.1.1.6 Subfeature Construction
3.1.2 OTHER FEATURE OPERATIONS
3.1.2.1 Deflecting a Call
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
3.4.1.1 Parameters Per SPCS
3.4.1.2 Parameters Per Directory Number and Call Type
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
LISTS OF FIGURES
Figure 1. Example Cluster Of I-CF Subfeatures For A Base DN
Figure 2. I-CF Activation Request During Call Establishment
Figure 3. I-CF Subfeature Information
Figure 4. Sending the SETUP ACKnowledge Message To The Base
           User
Figure 5. Request for Remote DN Information, or Status of
           Subfeature
Figure 6. Indication of Courtesy Call Establishment
Figure 7. Answer of Courtesy Call
Figure 8. First Message Clearing Subfeature Request During
           Call Establishment
Figure 9. Reminder Notification
Figure 10. Call Establishment at Remote DN (1 of 2)

Defines Bellcore's view of the proposed generic requirements for ISDN Call Forwarding. This enables a user to have calls redirected from the user's directory number to another directory number. The redirection function is performed by the Stored Program Controlled Switching System that serves the user. The Feature Requirements covered are: Feature Operations, Internal Call Processing Controls, Signaling/Message Structure, Administration, Interactions, Limitations and Restrictions, and Timing and Tolerances.