1998 Getting the authorization and certification for the installation of Ericsson equipment in the range of microwave, BTS and AXE for the mobile network operator D2 in the region north-east and east. 1997 Cooperation with Ericsson Expansion of the service for the installation of  AXE for the mobile network operator D2. 1996 Cooperation with Rhode & Schwarz Expansion of the service for the installation of worldwide commercial transmitting systems for Broadcast TV and Radio 1995 Cooperation with Elko Plus (ADC-Krone) Mounting of antenna systems  in an existing equipment for the mobile network operator D1 and D2. 1994 Cooperation with Ericsson Expansion of the service for the range MW- and BTS/GSM- installation for the mobile network operator D2 1993 Cooperation with FUBA Installation of antenna-systems for the mobile network operator C1 and D1 installation of microwave links for the mobile network operator E-Plus 1991 Cooperation with FUBA Planning and installation of networks for professional receipt of sound and TV broadcasting. 1990 Establishment of AVA GmbH Specialization in planning and installation of single antenna systems for sound and TV broadcasting. 1961-1989  Construction of antennas in an electric installation business. Imprint