1 Direct-Dialling-In
1.1 Introduction
1.1.1 Scope
1.1.2 References
1.1.3 Terms and definitions
1.1.4 Abbreviations
1.2 Description
1.2.1 General description
1.2.2 Specific terminology
1.2.3 Qualification on the applicability to
telecommunication services
1.2.4 State definition
1.3 Operational requirements
1.3.1 Provision/withdrawal
1.3.2 Requirements on the originating network
side
1.3.3 Requirements in the network
1.4 Coding requirements
1.5 Signalling requirements
1.5.1 Activation/deactivation/registration
1.5.2 Invocation and operation
1.6 Interaction with other supplementary services
1.6.1 Call Waiting (CW)
1.6.2 Call
Transfer (CT)
1.6.3 Connected Line Identification
Presentation (COLP)
1.6.4 Connected Line Identification Restriction
(COLR)
1.6.5 Calling Line Identification Presentation
(CLIP)
1.6.6 Calling Line Identification Restriction
(CLIR)
1.6.7 Closed User Group (CUG)
1.6.8 Conference Calling (CONF)
1.6.9 Direct-Dialling-In (DDI)
1.6.10 Call
Diversion Services (CDIV)
1.6.11 Line Hunting (LH)
1.6.12 Three-Party Service (3PTY)
1.6.13 User-to-User Signalling (UUS)
1.6.14 Multiple Subscriber Number (MSN)
1.6.15 Call Hold (HOLD)
1.6.16 Advice of Charge (AOC)
1.6.17 Sub-addressing (SUB)
1.6.18 Terminal Portability (TP)
1.6.19 Completion of Calls to Busy Subscriber
(CCBS)
1.6.20 Malicious Call Identification (MCID)
1.6.21 Reverse Charging (REV)
1.6.22 Multi-Level Precedence and Preemption
(MLPP)
1.6.23 Private Numbering Plan (PNP)
1.6.24 Charge Card
1.7 Interaction with other networks
1.8 Signalling flows
1.9 Parameter value (timers)
1.10 Dynamic description