ÖNORM EN 300324-1 V 2.1.1

This first part of EN 300 324 specifies the electrical, physical, procedural and protocol requirements for the V5.1 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 [8] for the case with a NT1 separate from the AN; ISDN basic access with a user network interface according to ETS 300 012 [4] 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 outband signalling information. With flexible (provisioned) information channel (bearer channel) allocation but without concentration capability within the AN. 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 V5.1 interface as specified in the present document is met. Protocol Implementation Conformance Statements (PICS) and the conformance test specification to the requirements of the present document will be provided in other parts of the present document. The present document identifies a number of functions, characteristics and procedures requiring either that they are pre-defined or provisioned via the relevant Q interface. Annex P lists references to those items in the present document. A complementary standard specifies interface V5.2 which is based on the V5.1 interface. Interface V5.1 will be upgradable to interface V5.2. The concept and the requirements for the upgrade are defined in annex F. Annex E provides an overview of the service scenarios and architecture taken as the conceptual basis for the specification of the V5.1 interface. Annex H to the present document provides additional notes and information flow diagrams to the PSTN protocol specification. (...abbreviated)