ÖNORM EN 300347-1 V 2.2.2

This first part of EN 300 347 specifies the electrical, physical, procedural and protocol requirements for the V5.2 interface between an Access Network (AN) and the Local Exchange (LE) for the support of the following access types: analogue telephone access; ISDN basic access with a line transmission system conforming to ETS 300 297 [4] for the case with an NT1 separate from the AN; ISDN basic access with a user network interface according to ETS 300 012 [3] at the user side of the AN, (i.e. the interface at the T reference point); ISDN primary rate access with a line transmission system conforming to ETS 300 233 [10] for the case with a NT1 separate from the AN; ISDN primary rate access with a user network interface according to ETS 300 011 [9] at the user side of the AN, (i.e. the interface at the T reference point); other analogue or digital accesses for semi-permanent connections without associated out-band signalling information, with flexible information channel (bearer channel) allocation on a call by call basis which provides concentration capability within the AN and over the V5.2 interface. The present document does not specify the implementation of the requirements within the AN and does not constrain any implementation alternative as long as the functionality at the V5.2 interface as specified in the present document is met. A link control capability is provided in order to manage the possible multi-link arrangements within a V5.2 interface. See clause 16. A protection capability is provided in order to allow the interface to continue functioning in the event of 2 048 kbit/s link failures. The present document should be used in conjunction with EN 300 324-1 [8]. The two documents share a common format and clauses within EN 300 324-1 [8] are referenced in the present document. Annex F provides an overview of the service scenarios and architecture taken as the conceptual basis for the specification of t (...abbreviated)