| 摘要 |
The invention relates to a method for transmission of dialling information between subscriber terminal devices and a central unit, where each subscriber is connected via two speech wires and two signal wires to the switching installation. The object is to dispense with expensive dialling transmitters and dialling receivers. The object is achieved by assigning a fixed position in the central unit to each key of the dialling device of the subscriber and also to the further operating elements and by transmitting the dialling information from this central unit (Z). For use in telephone systems. <IMAGE> |
