METHOD AND ARRANGEMENT FOR COUPLING MESSAGES IN A CENTRAL CONTROL DEVICE WITH DECENTRALIZED COMMUNICATIONS DEVICES

摘要

The invention relates to a novel private extension unit arrangement and the migration solutions of existing devices. Communications links are produced b y means of a transport network. Control is carried out in a centralised manner by means of a central control device (ZE2) which is connected to the decentralised network devices (DZ1, DZ10, DZ20) and the interface modules (DZ12, DZ237) via a two-step connection. The control messages are collected and distributed in a decentralised manner. The control connection from a decentralised device respectively to the central control device (ZE2) is provided via an ATM network or an ethernet connection.