1 Closed User Group (CUG)
1.1 Scope
1.2 References
1.3 Definitions
1.4 Abbreviations
1.5 Description
1.6 Operational requirements
1.6.1 Provision and withdrawal
1.6.2 Requirements on the originating network
side
1.6.3 Requirements on the destination network
side
1.7 Coding requirements
1.7.1 Messages and closed user group
information element
1.7.2 Cause information element
1.8 Primitive and state definitions
1.8.1 Primitive definitions
1.8.2 State definitions
1.9 Signalling procedures at the coincident SB and TB
reference point
1.9.1 Activation, deactivation and registration
1.9.2 Invocation and operation
1.10 Procedures at the TB reference point for
interworking with private B-ISDNs
1.11 Procedures for interworking between the DSS 1 and the DSS 2
protocol
1.12 Interactions with other networks
1.13 Interactions with (other) supplementary services
1.13.1 Connected line identification
presentation
1.13.2 Connected line identification restriction
1.13.3 Calling line identification presentation
1.13.4 Calling line identification restriction
1.13.5 Closed User Group
1.13.6 Direct-Dialling-In
1.13.7 User-to-user signalling
1.13.8 Multiple subscriber number
1.13.9 Sub-addressing
1.14 Parameter values
1.15 Dynamic
description (SDL)
1.15.1 The closed user group process
1.15.2 Relation to basic call/connection control
Annex A – Symmetric operation
Annex B – Protocol extensions to this Recommendation for calls/connections using the procedures of Recommendation
Q.2971 [13]