SSH EN 300 771-1 V2.0.1:2000

Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; B-ISDN user-network interface layer 3 specification for point-to-multipoint call/bearer control; Part 1: Protocol specification [ITU-T Recommendation Q.2971 (1995), modified]

Scope

The present document specifies the stage three of on-demand connection-oriented point-to-multipoint unidirectional
single bearer connection release 1 basic telecommunication services for the pan-European Broadband Integrated
Services Digital Network (B-ISDN) as provided at the TB reference point or coincident SB and TB reference point (as
defined in ITU-T Recommendation I.413 [2]) by means of the Digital Subscriber Signalling System No. two (DSS2)
protocol. Stage three identifies the protocol procedures and switching functions needed to support a telecommunications
service (see CCITT Recommendation I.130 [1]).
In addition, the present document specifies the protocol requirements at the TB reference point where the service is
provided to the user via a private B-ISDN.
NOTE: Procedures at the TB reference point, to support the access of a private B-ISDN to the public B-ISDN, are
not explicitly identified in the present document, however, some procedures are applicable only at the TB
reference point.
A basic Telecommunications service is a service to which supplementary services may be added.
Further parts of the present document provide the method of testing and detailed application specific requirements to
determine conformance to the present document.
The present document is applicable to equipment supporting connection-oriented basic B-ISDN telecommunication
services, to be attached at either side of a TB reference point or coincident SB and TB reference points when used as an
access to the public B-ISDN.
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