Table of Contents
1Definition
2Description
2.1Generaldescription
2.2Specificterminology
2.3Qualificationsontheapplicabilityto
telecommunicationservices
3Procedures
3.1Provision/withdrawal
3.2Normalprocedures
3.3Exceptionalprocedures
3.4Alternativeprocedures
4Networkcapabilitiesforcharging
5Inter-workingrequirements
5.1Inter-workingwithprivateISDNs
6Interactionwithothersupplementaryservices
6.1CallWaiting
6.2CallTransfer
6.3ConnectedLineIdentificationPresentation
(COLP)
6.4ConnectedLineIdentificationRestriction
(COLR)
6.5CallingLineIdentificationPresentation
(CLIP)
6.6CallingLineIdentificationRestriction
(CLIR)
6.7ClosedUserGroup
6.8ConferenceCalling
6.9Direct-Dialling-In
6.10CallDiversion(CallForwarding)services
6.11LineHunting
6.12Three-PartyService
6.13User-to-UserSignalling
6.14MultipleSubscriberNumber
6.15CallHold
6.16AdviceofCharge
6.17Multi-LevelPrecedenceandPreemption(MLPP)
service
6.18Priorityservice
7Dynamicdescription
ANNEXA-Optionalin-bandindications
A.1In-bandcallwaitingindication
A.2Activation/deactivation
A.3Inter-workingrequirements
ANNEXB-AdditionalBusyinformation
B.1Resourcebusyconditions Abstract
This is a supplementary service that permits a subscriber to be notified of an incoming call (as per basic call procedures) with an indication that no interface information channel is available. The user then has the choice of accepting, ignoring or rejecting the waiting call.
