IT-researcher & manager/sysadmin of a University institute network

freelance consultant for automation systems and VoIP application for SMEs and private usage

Various Voip-phones and ATAs in use on 3 ASTERISK systems under H.323, SIP and IAX2

VPN services

Programming in Assembler since 1974 - and in other languages later as well ;-) ...

... and licensed radio amateur (ham) DF5ZX ...