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Broadband Private Integrated Services Network (B-PISN) - Inter-exchange signalling protocol - Transit counter additional network feature (B-QSIG-TC)

1st edition, December 1996

This Standard specifies the signalling protocol for the support of the Transit Counter additional network feature (ANF-TC) at the Q reference point between Private Integrated Services Network Exchanges (PINXs) connected together within a Broadband Private Integrated Services Network (B-PISN).

ANF-TC is a feature that limits the number of Transit PINXs that a call/connection setup request may be routed through e.g., to protect the network against indefinite looping.

The Q reference point is defined in ISO/IEC 11579-1.

Service specifications are produced in three stages and according to the method specified in CCITT Rec. I.130. This Standard contains the stage 3 specification for the Q reference point and satisfies the requirements identified by the stage 1 and stage 2 specifications in ECMA-224.

The signalling protocol for ANF-TC operates in association with the signalling protocols for basic call/connection control (as specified in ISO/IEC 13247) and call independent (connection oriented) signalling connections (as specified in ECMA-254).

This Standard is applicable to PINXs that can interconnect to form a PISN.

The protocol defined in this Standard forms part of the B-QSIG protocol.

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CategoryData communication – PISN


Technical CommitteeTC32

ISO/IEC number15773