V Interfaces at the Digital Local Exchange (LE); V5.2 Interface for the Support of Access Network (AN); Part 7: Test Suite Structure and Test Purposes (TSS&TP) Specification for the Data Link Layer (Second Edition)
This seventh part of ETS 300 347 contains the Test Suite Structure and Test Purposes (TSSTP) for the Data Link Layer (DLL) of the V5.2 Interface. The objective of this ETS is to provide conformance tests giving a high probability of inter-operability of the DLL of an Access Network (AN) and a Local Exchange (LE) infrastructure. This ETS covers only the procedures described in ETS 300 347-1 [3] which are based upon ETS 300 402-2 [1]. ISO/IEC 9646-1 [5] and ISO/IEC 9646-2 [6] are used as the basis for the test methodology. For test definitions of protocol functions which are tested in V5.2 the same way as in V5.1@ only reference is made to ETS 300 324-7 [2]. ETS 300 347-1 [3] defines the sublayers of the DLL@ i.e. Link Access Protocol for V5 interface (LAPV5) Data Link sublayer (LAPV5-DL)@ LAPV5 Envelope Function sublayer (LAPV5-EF) and the mapping function (see ETS 300 347-1 [3]@ figure 6@ which illustrates this approach). Regarding the conformance testing@ these sublayer functions are not tested separately. The test purposes defined in clause 5 cover testing of the LAPV5-DL (control protocol only)@ LAPV5-EF and the mapping function. The AN frame relay function is tested in co-operation with a generic test of an Integrated Services Digital Network (ISDN) D-channel. The limitation of the DLL test to the Control DL is based on the assumption that the Public Switched Telephone Network (PSTN) DL@ the Protection DL@ the Link control DL and the Bearer Channel Connection (BCC) DL implementations are identical with the Control DL implementation. This needs to be declared by the Implementation Under Test (IUT) supplier. Otherwise@ the test purposes defined for the Control DL may be used for the other DLs as well.