- Use the Fiber Ring as a launch cable.
Connect the Fiber Ring between your OTDR and the fiber link under test. This will allow you to measure the loss of the near-end connection. - Use the Fiber Ring as a receive cable.
Connect the Fiber Ring to the far-end connector of your fiber link under test. This will allow you measure the loss of the far-end connection. - By using Fiber Rings as both launch and receive cables, as shown in the diagram below, you can measure total insertion loss of the fiber link under test.
Example OTDR Test Configuration With Launch And Receive Cables
OTDR Trace Made Using Launch And Receive Cables