COMMUNICATION SYSTEM WITH AN ISDN TERMINAL CONNECTION FOR DIFFERENT ISDN INTERFACES IN AN ISDN SWITCHING DEVICE NETWORK.

摘要

The Integrated Services Digital Network terminal equipment is connected into the network via either a two-wire link or a four-wire link to a detector unit with a switch bank and auxiliary power supply. The connection is recognised automatically and switched to the corresp. termination unit. The two-wire connection when detected is converted into a four-wire one and assigned to an additional plug connector in the sense of connection of further terminal equipments. The four-wire connection when detected is switched directly to the additional plug connector.