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OTDR PON Testing: The Challenges-The Solution

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OTDR PON Testing: The Challenges-The Solution

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  • Author: Mario Simard
Since the first deployment of passive optical networks (PONs), a variety of testing methods have been designed for the verification and troubleshooting of PONs such as testing all points from the central office (CO) to the optical network terminal (ONT), testing some parts of the network and in some cases, simply not testing at all. With time however, the option of not testing at all has proven to generate more expenses at activation, making it an unsuitable option due to the additional costs in the long-term. With all PON deployments that are expected to take place in the next three years, operators will repeatedly face the challenge that testing PONs poses. Based on past experience, the best PON-testing method that has emerged is derived from optical time-domain reflectometry (OTDR). The OTDR method has shown reliable results, while reducing the overall cost of testing. Since the OTDR method is a single-ended method, it significantly reduces staff time, which is its key advantage.

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