FOA CFOS/T case studies
FOA CFOS/T · Put your knowledge to work in context.
The FOA CFOS/T is the Fiber Optic Association's specialist certification in fiber optic testing, one of the association's CFOS specialist credentials. It is aimed at technicians who already hold basic fiber optic training and now want to demonstrate competence in testing fiber optic cable plants, both outside plant and premises. The exam covers microscope inspection and connector cleaning, visual fiber tracing and fault location, optical power measurement, insertion loss testing and OTDR testing, along with test instrument types, loss budget calculations, fiber characterization and PON testing. It also tests the checklists that help a tech ensure comprehensive testing and ease troubleshooting, and the measurement uncertainty of fiber optic measurements, beginning with typical measurement errors. The FOA CFOS/T case studies are 5 cases and about 2,877 words.
1Core-Zone Pit on a Factory MPO Trunk
You are the lead tester on a new single-mode data center build. A 24-fiber MPO trunk (OS2, APC) runs 85 m from the MDA to a row distributor and breaks out to 12 LC/UPC duplex ports.
624 words, about 3 min2VFL Glow at an Intermediate Patch Panel
A 24-strand OS2 campus cable runs 1.35 km from Building A to Building C, with a splice closure at 450 m and a patch panel in Building B at 900 m. Strand 7 is an unlit spare.
575 words, about 3 min3Transmitter Output 6 dB Low on a 10G Link
You are qualifying a 10GBASE-ER SFP+ before installation. The datasheet gives average launch power +4.0 dBm maximum and -1.0 dBm minimum at 1550 nm; receiver sensitivity is -16.0 dBm.
528 words, about 3 min4Can This PON Support a 1:64 Splitter?
A rural GPON extension is being designed with a 1:32 splitter. The OLT port has a measured launch power of +3.0 dBm at 1490 nm.
581 words, about 3 min5Wavelength-Dependent Event at 1.1 km
You are characterizing a 2.4 km OS2 link between a hospital building and a utility vault. The link has a splice closure at 1.1 km with two fusion splices and a patch panel at each end.
569 words, about 3 min