ETS 300 141-1 : 20001

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.