Holger Derek

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Holger Derek is a Customer Support Engineer at Avaya Deutschland GmbH in Germany. With expertise in VoIP, telekommunikation, IP, and phone, Holger Derek is skilled in various technologies such as TCP/IP, Cisco technologies, Linux, and CCP. He has experience working at Avaya in the United States, specifically in New Jersey, Morristown. Avaya is a global IT services and consulting company with a wide range of products and services, catering to businesses, digital marketers, social media managers, and more.
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