Learn how OTDR testing works and compare ZION OTDR models to choose the best tester for FTTH, PON, ODN, and backbone networks. Fully featured, entry-level, dedicated OTDR with tablet-inspired design, suitable for metro and optimized to test through optical splitters, for seamless end-to-end FTTH characterization and troubleshooting. To view the full specifications, download the spec sheet below. The MaxTester 700D OTDR. VIAVI provides the widest range of OTDR testing tools delivering everything from basic fiber certification to fully automated bidirectional OTDR testing that scales for multi-fiber cable certification. We offer OTDRs for wide-area networks from AFL Noyes and VIAVI. They can be used in. JDSU has designed an optical time domain reflectometer (OTDR) with the required performance and functions for the char-acterization of various optical networks, such as CWDM, wireless backhaul, and FTTx. The Enhanced Metro-Access (MAE) OTDR Module meets the challenges of commissioning a complete. OTDR test solution for use in installing, turning up, and maintaining long-haul, metro, FTTx/PON, access, and enterprise networks. Selecting the right OTDR ensures accurate measurements, efficient fault detection, and cost-effectiveness.