The manufacturer of the FTB-300 with Single-Mode 1310nm & 1550nm OTDR Moduleis Exfo. The FTB-300 Universal Test System (UTS) performs numerous tests for network installation, maintenance and troubleshooting. Housing up to three easily interchangeable, high-performance test modules, the FTB-300 UTS provides maximum processing capability where you need it most: in the field. The product is located in Lake Mary, FL, USA.