Feature 1 Support single or multiple work, with great workmanship, can perfectly meet your needs. 2 There is no welding joint in the middle of the fiber and disc structure design, small in size, light in weight and easy to carry. 3 Hook type carrying to meet different usage scenarios, thereby improving work efficiency. 4 This product has high accuracy and can provide you with an accurate test result. 5 With strict quality control and quality assurance, high safety factor, can be used with peace of mind.Item Type: OTDR Optical Fiber Launch CableSC/APC-SC/APC stands for connectorOS2 stands for single modeTesting, Inspection and Positioning: OTDR optical fiber extension cable is used to measure the insertion loss and reflectivity of the near-end connection and the far-end connection of the optical fiber line using OTDR. Each OTDR optical fiber extension cable can be used as an OTDR transmitting optical cable and an OTDR receiving optical cable. When using an OTDR to measure the complete line loss of an optical fiber, both of which are necessary to eliminate the dead zone. The OTDR optical fiber extension cable is designed in a coiled manner, which is convenient to carry, small and light. A variety of length options are very suitable for short, medium and long distance optical fiber network test applications.How to Use Fiber Extension Cords to Generate Baseline Traces: 1. Use the OTDR optical fiber extension cable as the launching cable: Connect the OTDR optical fiber extension cable between the OTDR and the optical fiber line under test. This will enable you to measure the loss of the near-end connection. 2. Use the OTDR optical fiber extension cord as a receiving optical cable: Connect the optical fiber extension cord to the remote connection of the optical fiber line under test. This will allow you to measure the loss of the remote connection. 3. By using the optical fiber extension cable as the transmitting and receiving optical cable, you can easily measure the total insertion loss of the optical fiber line under test. Package List1 x OTDR Optical Fiber Launch Cable