Check the listing for details. Exfo Packet Blazer SAN FTB-8520 FTB-8520-1-200. Condition: Used. Listed at 100.00 USD. The Exfo Packet Blazer SAN FTB-8520 FTB-8520-1-200 is a specialized OTDR (Optical Time Domain Reflectometer) designed by EXFO. It is specifically tailored for testing and inspecting fiber optic networks in Storage Area Networks (SAN) environments. This device is part of the FTB series, known for its high performance and reliability in fault locators and reflectometry applications. It is a highly advanced tool for ensuring the quality and efficiency of fiber optic communication systems within SAN infrastructures. Used