The present document specifies the stage three of the Teleaction bearer service for the pan-european Integrated Services
Digital Network (ISDN) as provided by the European public telecommunication operators at the T reference point or
coincident S and T reference point (as defined in CCITT Recommendation I.411 [1]). Stage three identifies the protocol
procedures and switching functions needed to support a telecommunications service (see
CCITT Recommendation I.130 [2]).
The present document also provides guidance on the network functionality required to implement the Teleaction service
(see annex B). The functional capabilities and information flows of such network entities are described. In the absence
of a stage 2 description this information has been included in the present document. This does not preclude its future
publication as a separate stage 2 standard.
In addition, the present document specifies the protocol requirements at the T reference point where the service is
provided to the user via a private ISDN.
The present document does not specify the additional requirements where the service is provided to the user via a
telecommunications network that is not an ISDN, but does include interworking requirements of other networks with the
public ISDN.
Teleaction is a service providing for reliable, low volume, data communication and allied processing to users. The
Teleaction bearer service may be used for applications such as monitoring, indicating, controlling and verifying of
remote events, operations, and measurements.
Charging principles are outside the scope of the present document.
Further parts of the present document specify the method of testing required to identify conformance to the present
document.
The present document is applicable to equipment, supporting the Teleaction bearer service, to be attached at either side
of a T reference point or coincident S or T reference point wh (...abbreviated)