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What is the difference between single direction fiber testing and bidirectional fiber testing on the Viavi 40G Certifier? Is only one fiber attached for single?

Question asked by viavisupport on Feb 21, 2017
Latest reply on Feb 21, 2017 by viavianswers
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40G Certifier Birdirectional versus Unidirectional
What is the difference between single direction fiber testing and bidirectional fiber testing on the Viavi 40G Certifier? Is only one fiber attached for single?
viavianswers
viavianswers Feb 21, 2017 10:06 AM
Correct Answer
Two fibers are always attached for 40G Certifier autotest fiber testing. When single direction is selected, on the 40G Certifier, Fiber 1 is tested from Local to Remote and Fiber 2 is tested from Remote to Local. If bidirectional is selected then both fibers are tested from both directions and the unit will prompt you to switch the fibers during the test. DO NOT switch the fibers at the connection to the testset. Removing the transmit fiber connection, at the testset, invalidates your reference. Switch the fibers at the connection to the panel.
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