CONNECTION OF MULTI-LINE SUBSCRIBER TELEPHONE DEVICE

The connection of the multiple-line subscriber's telephone set is used especially for multiple-line telephone sets and secretarial sets. It enables concentration of all basic functions into one central part with the common control block. The decentralized control device, which can be connected to the central part in a larger number, is only one-lined, and therefore very simple. The merit concerns the fact that a central control block, data memory, line block and connecting block are connected in the central part to the central data bus and central control bus. Lines from the central exchange are connected via the line block and dialling block to the decentralized control device, which is also connected to the connecting block. If several decentralized control devices are connected to the central part, each control device is connected via the autonomous dialling block and autonomous connecting block. A transmission block, control block, block of control elements and signalisation block are connected in the decentralized control device to the data bus and control bus. The decentralized control device is connected to the central part via the transmission block and switching block, which is connected both with the amplifier of loud hearing with an electroacoustic transducer and with the speaking circuits with a micro telephone.