1
Scope
2
References
3
Terms and Definitions
4
Abbreviations and Acronyms
5
SS-CO Service Description
5.1 Normal Procedures
5.1.1
Activation/deactivation/registration/interrogation
5.1.2
Invocation and operation
5.2 Exceptional Procedures
5.3 Interactions with other supplementary services
5.3.1 Call Transfer (SS-CT)
5.3.2 Call Forwarding Unconditional (SS-CFU)
5.3.3 Call Forwarding Busy (SS-CFB)
5.3.4 Call Forwarding No Reply (SS-CFNR)/Call
Deflection (SS-CD)
5.3.5 Call Hold
5.3.6 Call Park/Call Pickup
5.3.7 Call Waiting
(SS-CW)
5.3.8 Message Waiting Indication
5.3.9 Name Presentation
5.3.10 Completion of Calls to Busy Subscriber
(SS-CCBS)
5.3.11 Completion of Calls on No Reply (SS-CCNR)
5.3.12 Call Intrusion (SS-CI)
5.3.13 Call Linkage
6
Messages and information elements
7
Signalling Procedures
7.1 Actions at User A's Endpoint
7.1.1 Normal procedures
7.1.2 Exceptional procedures
7.2 Actions at User B's Endpoint
7.2.1 Normal procedures
7.2.2 Exceptional procedures
8
Interworking and Interactions
8.1 Interworking
with SCN
8.2 Protocol interaction between SS-CO and other Supplementary
Services
8.2.1 Call Transfer (SS-CT)
8.2.2 Call Forwarding Unconditional (SS-CFU)
8.2.3 Call Forwarding Busy (SS-CFB)
8.2.4 Call Forwarding on No Reply
(SS-CFNR)/Call Deflection (SS-CD)
8.2.5 Call Hold
8.2.6 Call Park/Call Pickup
8.2.7 Call Waiting
8.2.8 Message Waiting Indication
8.2.9 Name Presentation
8.2.10 Completion of Calls on Busy Subscriber
(SS-CCBS)/on No Reply (SS-CCNR)
8.2.11 Call Intrusion
8.2.12 Call
Linkage
9
Gatekeeper/Proxy Actions
9.1 Gatekeeper passes on SS-CO operations to the endpoint
9.2 Gatekeeper/proxy acts on behalf of an endpoint
9.2.1 Gatekeeper/proxy acts on behalf of
endpoint A
9.2.2 Gatekeeper/proxy acts on behalf of
endpoint B
10 Dynamic Description
10.1 Operational Model
10.2 Signalling Flows
10.2.1 Successful SS-CO
10.2.2 SS-CO invocation – unsuccessful
10.2.3 SS-CO invocation with user B not being
busy
10.2.4 Successful SS-CO with GK being
transparent for SS-CO signalling
10.2.5 Successful SS-CO with GK acting on SS-CO
10.3 Communication between an endpoint A signalling entity (EASE)
and its Signalling entity user (informative)
10.3.1 Table of primitives
10.3.2 Primitive definition
10.3.3 Parameter Definition
10.4 Communication between an endpoint B signalling entity (EBSE)
and its signalling entity user (informative)
10.4.1 Table of primitives
10.4.2 Primitive definition
10.4.3 Parameter Definition
10.5 Call states
10.5.1 Call States at endpoint A
10.5.2 Call States at endpoint B
10.6 Timers
11 Operations in support of Call
Offer supplementary service
12 Specification and Description
Language (SDL) Diagrams for SS-CO
12.1 Behaviour of user A's endpoint
12.2 Behaviour of user B's endpoint