6 Global virtual network service
6.1 Introduction
6.1.1 Scope
6.1.2 References
6.1.3 Terms and definitions
6.1.4 Abbreviations
6.2 Description
6.2.1 General description
6.2.2 Specific terminology
6.2.3 Qualification on the applicability to
telecommunication services
6.2.4 State definitions
6.3 Operational
requirements
6.3.1 Provision and withdrawal
6.3.2 Requirements on the originating network
side
6.3.3 Requirements in the network
6.3.4 Requirements on the terminating network
side
6.4 Coding requirements
6.4.1 Messages
6.4.2 Parameters
6.5 Signalling procedures
6.5.1 Activation/deactivation/registration
6.5.2
Invocation and operation
6.6 Interactions with other supplementary services
6.6.1 Call Waiting (CW)
6.6.2 Call transfer services
6.6.3 Connected line identification
presentation (COLP)
6.6.4 Connected line identification restriction
(COLR)
6.6.5 Calling Line Identification Presentation
(CLIP)
6.6.6 Calling Line Identification Restriction
(CLIR)
6.6.7 Closed User Group (CUG)
6.6.8 Conference calling (CONF)
6.6.9 Direct-Dialing-In (DDI)
6.6.10 Call diversion services (CDIV)
6.6.11 Line Hunting (LH)
6.6.12 Three-Party service (3PTY)
6.6.13 User-to-User Signalling (UUS)
6.6.14 Multiple Subscriber Number (MSN)
6.6.15 Call hold (HOLD)
6.6.16 Advice of Charge (AOC)
6.6.17 Sub-addressing (SUB)
6.6.18 Terminal Portability (TP)
6.6.19 Completion of Calls to Busy Subscriber
(CCBS)
6.6.20 Malicious Call Identification (MCID)
6.6.21 Reverse charging (REV)
6.6.22 Multi-Level Precedence and Preemption
(MLPP)
6.6.23 Private Numbering Plan (PNP)
6.6.24 International Telecommunication Charge Card
(ITCC)
6.7 Interaction with other networks
6.8 Signalling flows
6.9 Parameter values (timers)
6.10 Dynamic description