The OTDR requires launching and receiving test cables to measure end-to-end loss in fiber optic links. A launch reel, connecting the OTDR to the link under test, reveals the insertion loss and reflectance of the connection at the near end. A receive cable, connected to the farthest link, reveals the insertion loss and reflectance of the connection at the farthest end.

The reels are available with all types of connectors.

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