Rx/Tx Satellite Systems for voice, data images and video-conference. EuroISDN private communication systems, Networked or Stand-Alone, according to AT&T and SIEMENS technology. They are able to give a wide range of adanced services and in particular: Voice Mail, Call Center, C.T.I. applications (Computer Telephone Integration), DECT (cord-less) and Video-communication. Packet-switched Data networks (nation wide) with protocols: X25, X28, SDLC and Frame Relay.