Adtran Networks SE develops, manufactures, and sells optical and Ethernet-based networking solutions for telecommunications carriers and enterprises. It provides its solutions to deliver data, storage, voice, and video services. The company offers open optical networking products, such as open line systems, optical terminals, pluggable optics, management and control, and ALM fiber monitoring; access and aggregation switches and routers, optical line terminals, network management and automation, cabinets and enclosures, and ALM PON monitoring; residential, business, and wholesale subscriber solutions; and automation and insight solutions comprising management and orchestration, and network and subscriber insights. It also provides network infrastructure assurance which includes ALM fiber and PON monitoring; timing and synchronization; and global, consulting and education, deployment, cloud and software, support, and training services. In addition, the company offers cloud interconnect solutions, including DWDM optics, secure data transport, thin transponders, and MicroMux Quattro; and optical networking solutions that include purpose-built plugs and intelligent control. It serves Altnets, Cable MSOs, municipal broadband solutions, telcos, and utilities industries. The company operates in Germany, rest of Europe, the Middle East, Africa, the Americas, and the Asia-Pacific. The company was formerly known as ADVA Optical Networking SE and changed its name to Adtran Networks SE in June 2023. The company was founded in 1994 and is headquartered in Munich, Germany. Adtran Networks SE operates as a subsidiary of ADTRAN Holdings, Inc.