Satellite communication system integrated into terrestrial ISDN

This paper presents an advanced satellite communication system named DYANET II. This system uses satellite channels as subscriber lines for ISDN custo mers as well as trunk circuits for overflow traffic, The system can offer t he same ISDN services to satellite customers as those available to terrestr ial subscribers in terms of numbering, signaling, and charging systems as w ell as user-network interfaces, It can also set up satellite channels on a demand assignment basis to achieve efficient satellite channel utilization, and to connect customers by single-hop satellite connections. A compact, l ightweight Earth station has been developed for remote customers and tempor ary demands such as exhibitions.