| 摘要 |
In a circuit arrangement for identifying continuous one or zero signals on connection lines (Lan) of an exchange which transmit signals in the incoming transmission direction, in which the connection lines are combined to form connection line groups (LTEC), each connection line group (LTEC) has at least one associated monitoring circuit (D0, D1, Ec), which can be connected to a connection line (Lan) transmitting signals in the incoming transmission direction and which, on the occurrence of continuous one or zero signals whose duration exceeds a predefined minimum duration (tx, ty), transmits output signals characterising this condition. <IMAGE> |
