Frank Krause

MRV Communications, Inc. engages in designing, developing, and selling of products and services that enable customers to build networks. It operates through the following geographical segments: United States, Americas (Excluding the U.S.), Europe, and Asia Pacific. The company was founded by Shlomo Margalit in July 1988 and is headquartered Norcross, GA.

Telindus Group NV provides information communication technology (ICT) services. The firm designs and builds communications networks, including local area (LANs) and wide area networks (WANs) and provides network support services. Telindus also offers Internet protocol (IP) telephony, wireless services and voice, data and Internet access services. The company is headquartered in Heverlee, Belgium.

Part of Atecs Mannesmann AG, o.tel.o GmbH is a mobile phone service provider based in Cologne, Germany. The German company offers affordable mobile phone contracts and prepaid plans on the Vodafone network, as well as a range of popular smartphones from brands like Apple and Samsung. Customers can manage their accounts and get information about their plans through the Mein otelo app. In 1999, o.tel.o was acquired by Mannesmann Arcor AG & Co. from E.ON SE for $1,224.52 million.

KEYMILE International GmbH operates as a holding company with interest in manufacturing data transmission systems. It offers customer services such as project planning and management, installation and commissioning, help in activating networks, support in operating and extending networks. The firm offers its services to the public telecommunications, mobile and professional radio and transport infrastructures. The company was founded in 1992 and is headquartered in Brunn am Gebirge, Austria.

AUVIDA GmbH provides IT solutions and is ultimately controlled by the Government of Belgium. The company is based in Friedrichsdorf, Germany.

Part of Caverion Oyj, Caverion GmbH is a German company that provides facility construction, operation, and management services. The company is based in Stuttgart, Germany.