Switching circuit with selection registers for telephone exchanges - has coupling panel responsive to central control mechanism for processing incoming dialling signals

摘要

The signal transfer devices (UE1-UEN) are marked by a route searching device (UE-SU) prior to taking over a selection signal in one of the registers (REG1-REG7). A bundle marker (BM), which discerns original directions, provides the identification is coupled a number complementing device (ZR) which is arranged in accordance with the structure of each individual system. The number complementing device transmits a selection complementing signal into the specific register. This transmission is carried out in dependence on a program signal transmitted by the central control mechanism (ZST), and on individual register output signal (r1-r7). The complemented selection signal is preferably stored into the respective register.