G657A OM1 OTDR Launch Cable Box SM SC LC FC ST Connector 1-20km

G652D G657A OM1 OM2 OM3 OM4 Cable SM SC LC FC ST Connector 1km to 20km OTDR Launch Cable Box

Measuring an insertion loss of the near-end and / or far-end connection of a fiber optic link with an OTDR requires a launch and /or receives test cable. A launch cable, which connects the OTDR to the link under test, reveals the insertion loss and reflectance of the near-end connection. A receive cable, which connects to the far-end of the link, reveals the insertion loss and reflectance of the far-end connection. Launch and receive test cables can range from 1 km to 2 km (or longer) in length. Because very long test cables are impractical to transport and use, FONGKO offers coiled lengths of 50 um multimode, 62.5 um multimode, or single-mode fiber packaged in compact rings. Fiber Rings of 1000 m of fiber are ideal for premises fiber network test applications. Fiber Rings of 1 km and 2 km of single-mode fiber are designed for broadband, long-haul fiber network test applications.