Oi Electric Co. Ltd. (OECL) is equipment manufacturing company that offers telecommunication equipment, mobile communication equipment and measuring instruments. The company's telecommunication equipment includes multiplexing system, transmission equipment, media converter, contact data transmitter and others. It offers wireless equipments such as pagers and low-power transceivers for hotel use, hospitals and factories. OECL's measuring instruments, which include frequency selective level meter, tone channel select level meter, bit error tester, ISDN line tester, protocol tracer, fading analyzer and others. The company has its presence in Tohoku, Chubu, Osaka, Hiroshima and Kyushu. OECL is headquartered in Yokohama, Japan.