Data link for operation - and maintenance functions (oa amp; m) in a digital telecommunications network

摘要

In an access node (AN) of a telecommunications network which is connected to a subscriber terminal exchange (LE) via a V.5 interface comprising speech/data channels in a system of B channels (L1-TS 1 to Ln-TS 31), the data circuit between the management system (MS) of the telecommunications network is realized with the aid of a configuration interface device (Q-IF) which is provided for setting OA & M functions and which is connected to a defined B channel (L1-TS 1) at least in the default configuration of the access node (AN). According to the invention, the defined B channel (TS 1) is excluded from the operation also outside the default configuration as a speech/data channel by a software setting function and, therefore, is excluded from the dynamic channel allocation by the subscriber terminal exchange (LE) in order to transport management system information as a connection to the data communications network (DCN) of the management system (MS). The software setting function is conducted on a speech/data channel access outside the access node (AN) by installing a fixed connection between the subscriber terminal exchange (LE) and the access node (AN).