Oi Electric Co., Ltd. provides information and communication equipment and related services for social infrastructure in Japan. The company offers transmission and monitoring devices, such as optical transport network platform system, an optical network equipment; media converter equipment; and contact information transmission equipment. It also provides electronic measuring instruments, including multifunctional level variation recorders, line noise measuring instruments, analog level meters, ISDN lines analyzers and testers, selective level meters for broadband measurement, frequency selective level meters, receiving sensitivity analyzers, bit error rate testers, measuring instruments for transmission characteristics, variable resistor attenuators, circuit inspection testers, tone channel selective level meters, security and monitoring systems, remote measurement and sensing systems, wireless application systems. In addition, the company is involved in the manufactures and sells software for related equipment; construction and maintenance of communication equipment, optical networks, CATV, etc.; and operates restaurants, building management, and temporary staffing, etc. Oi Electric Co., Ltd. was incorporated in 1950 and is headquartered in Yokohama, Japan.