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Is there a need for 1490 nm testing in PONs?

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Is there a need for 1490 nm testing in PONs?

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This paper explains the difference between 1490 nm optical time domain reflectometer (OTDR) and insertion loss testing as well as physical layer and equipment/transmission signal testing. It also describes the technical and economical differences between 1490 and 1550 nm when analyzing the intrinsic characteristics of the fiber.

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