Adtran Networks SE (Adtran Networks) develops hardware and software solutions that support communication services. The company's offerings range from core to door, billing integrations and consulting services. It also provides differentiated network synchronization solutions for mobile networks and expands its portfolio to address timing requirements for other industries, particularly critical infrastructure. Adtran also operates in the WDM9 market, a core segment of the overall optical networking hardware market. Its services encompass Consulting Services, Legal Services, Software Services, and Cloud Services.

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The R&D arm of Adtran Networks focuses on three technology areas comprising enhancements to the open optical transport solution with the development of the new M-Flex100 terminal and improvements to the Optical Line System (OLS) to boost capacity and performance. It also involved in the development of next-generation high-speed network terminals, the expansion of encryption technologies to meet regulatory requirements related to infrastructure regulations, and expanding the Oscilloquartz product portfolio for network synchronization. With key initiatives in hand such as the SFlex 400G Layer-1 encryption. In FY2025, the company incurred expenses of EUR109.8 million on R&D, which as a percentage of revenue, stood at 22.8%.