2.1 Introduction
2.1.1 Scope
2.1.2 References
2.1.3 Terms and definitions
2.1.4 Abbreviations
2.2 Description
2.2.1 General description
2.2.2 Specific terminology
2.2.3 Qualification on the applicability to telecommunication services
2.2.4 State definitions
2.3 Operational requirements
2.3.1 Provision/withdrawal
2.3.2 Requirements on the originating network side
2.3.3 Requirements in the network
2.3.4 Requirements on the terminating network side
2.4 Coding requirements
2.4.1 Messages
2.4.2 Parameters
2.5 Signalling requirements
2.5.1 Activation/deactivation/registration
2.5.2 Invocation and operation
2.6 Interactions with other
supplementary services
2.6.1 Call Waiting (CW)
2.6.2 Call transfer services
2.6.3 Connected Line Identification Presentation (COLP)
2.6.4 Connected Line Identification
Restriction (COLR)
2.6.5 Calling Line Identification Presentation (CLIP)
2.6.6 Calling Line Identification Restriction (CLIR)
2.6.7 Closed User Group (CUG)
2.6.8 Conference calling (CONF)
2.6.9 Direct Dialling-In (DDI)
2.6.10 Call diversion services
2.6.11 Line Hunting (LH)
2.6.12 Three Party Service (3PTY)
2.6.13 User-to-User Signalling (UUS)
2.6.14 Multiple Subscriber Number (MSN)
2.6.15 Call hold (HOLD)
2.6.16 Advice of Charge (AOC) 2.6.17 Sub-addressing (SUB)
2.6.18 Terminal Portability (TP)
2.6.19 Completion of Calls to Busy Subscriber (CCBS)
2.6.20 Malicious Call Identification (MCID)
2.6.21 Reverse charging (REV)
2.6.22 Multi-level Precedence and Preemption (MLPP)
2.6.23 Private Numbering Plan (PNP)
2.6.24 International telecommunication charge card
2.7 Interactions with other networks
2.7.1 Interactions with networks not providing any call diversion information
2.7.2 Interactions with private ISDNs
2.8 Signalling flows
2.9 Parameter values (timers)
2.10
Dynamic description