scope:

This fifth part of ETS 300 267 is applicable to the stage three of the telephony 7 kHz and videotelephony teleservices for the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications operators at the T reference point or coincident S and T reference point (as specified in ITU-T Recommendation I.411 [8] by means of the Digital Subscriber Signalling System No. one (DSS1) protocol. ETS 300 267-1 [3] provides the protocol specification and ETS 300 267-2 [4] the Protocol Implementation Conformance Statement (PICS) proforma specification. Stage three identifies the protocol procedures and switching functions needed to support a telecommunications service (see CCITT Recommendation I.130 [7]). This ETS specifies the Test Suite Structure and Test Purposes (TSS&TP) for the network side. It covers the protocol requirements as defined in ETS 300 267-1 [3] and provides test purposes for the additional generic requirements for basic telecommunication services not defined in ETS 300 102-1 [1] (ETS 300 267-1 [3], clause 5), for the telephony 7 kHz teleservice (ETS 300 267-1 [3], clause 6) and for the videotelephony teleservice (ETS 300 267-1 [3], clause 7).