M00044140
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INTEGRATED SERVICES DIGITAL NETWORK (ISDN); CALL HOLD (HOLD) SUPPLEMENTARY SERVICE - DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 (DSS1) PROTOCOL - PROTOCOL SPECIFICATION
European Telecommunications Standards Institute
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Availability date: 11/06/2021
Foreword
1 Scope
2 Normative references
3 Definitions
4 Symbols and abbreviations
5 Description
6 Operational requirements
6.1 Provision and withdrawal
6.2 Requirements on the originating network side
6.3 Requirements on the destination network side
7 Coding requirements
8 State definitions
9 Signalling procedures at the coincident S and T
reference point
9.1 Holding a call - procedures at the interface of
user A
9.2 Holding a call - procedures at the interface of
user B
9.3 Retrieving a call - procedures at the interface
of user A
9.4 Retrieving a call - procedures at the interface
of user B
10 Procedures for interworking with private ISDNs
10.1 User A is on a private ISDN
10.2 User B is on a private ISDN
11 Interactions with other networks
12 Interactions with other supplementary services
13 Parameter values (timers)
14 Dynamic Description (SDLs)
Annex A (informative): Signalling flows
History
Specifies the stage three of the pan-European Integrated Services Digital Network (ISDN) as given by European public telecommunications operators for the Call Hold (HOLD) supplementary service at the T reference point or coincident S and T reference point by using the Digital Subscriber Signalling one (DSS1). Specifies the protocol requirements at the T reference point where the service is given to the user via a private ISDN. Does not specify the additional protocol requirements where the service is given to the user via a telecommunications network that is not an ISDN.
Published | |
Document Type | Standard |
Status | Current |
Publisher | European Telecommunications Standards Institute |
Pages | |
ISBN | |
Committee | SPS 5 |