FOA CFOS/S case studies
FOA CFOS/S · Put your knowledge to work in context.
The FOA Certified Fiber Optic Specialist in Splicing (CFOS/S) is a specialist-level credential offered by The Fiber Optic Association, Inc., which describes itself as an international non-profit educational association chartered to promote professionalism in fiber optics through education, certification and standards, and as an internationally recognized certifying body for fiber optics. CFOS/S sits above the entry-level CFOT credential: it signals that a technician has gone deeper into one subject area, in this case fiber optic splicing, rather than only covering the general body of fiber optic knowledge. The FOA CFOS/S case studies are 5 cases and about 2,887 words.
1Bidirectional OTDR Acceptance of an Apparent Negative-Loss Fusion Splice
A 18.2 km single-mode outside-plant span on G.652.D fiber is being accepted after fusion splicing six splices. The contractor specification is a maximum bidirectional splice loss of 0.15 dB; unidirectional OTDR values are not acceptance values.
613 words, about 3 min2Ribbon Fiber Macrobend in an Aerial Pedestal Closure
After a 24-fiber ribbon cable is spliced in an aerial pedestal, the closure is closed and the span is tested at 1310 and 1550 nm. All 24 fusion splices had splicer-estimated losses between 0.01 and 0.05 dB.
596 words, about 3 min3Fusion Splicer Arc Calibration at Altitude with Worn Electrodes
At a 3,200 m elevation site, a crew is splicing 288 single-mode fibers in an outdoor cabinet. Morning temperature is 2°C and relative humidity is 35%.
531 words, about 3 min4Mechanical Splice with High Reflectance in an FTTH Drop
A field technician is installing a drop to a single-family home. The link is 1.4 km feeder, a 1x8 PLC splitter, and 85 m of drop cable.
564 words, about 3 min5Emergency Restoration with Limited Splice Trays and Mixed Circuit Priorities
A 48-fiber single-mode cable is cut during excavation. The available closure has two 12-fiber splice trays, so only 24 fusion splices can be protected.
583 words, about 3 min