System for operating analogue terminals at ISDN multi apparatus links

摘要

The system includes terminals and extension installations which are operated at ISDN multi apparatus links by a system utilising ISDN performance characteristics. In the analog terminal or extension installation is integrated a terminal adapter (TA) with A-B interfaces. The adapter contains an So interface, coder and decoder for converting analogue signals into digital signals and vice versa. The terminal adapter can be integrated with e.g. a facsimile apparatus.