Coupling circuit for monitoring a multiplicity of data lines

摘要

The coupling circuit is provided for monitoring a multiplicity of special lines of a telecommunication network, in which, starting from a central measuring point, the connection is made via branching circuits to the respective data line to be tested. The wiring and the branching circuits, which in each case have a multiplicity of outputs, are provided at least in duplicate between the measuring systems except for the last branching circuit, which is located before the connection to the data line to be measured, so that two independent distributor networks are formed. In the last branching circuit, switchover devices are provided which allow the separation of the data lines which are to be measured and the connection of one distributor network or the other to the data lines which are to be tested. As a result, as well as the data line which has just been measured, each of the remaining data lines can be connected to a further measuring system for an additional measurement. <IMAGE>