Fiber cold continuation will completely replace the hot melt to become FTTH mainstream
with our "broadband" start, FTTH FTTH dispute in fiber splice technology never stop, fiber cold continuation because of its convenient, efficient construction and low cost, widely used in foreign countries , especially in Japan, Korea and other places, large area, proved cold junction is feasible. In the country after nearly two years, the situation is not ideal, because there are four aspects:1, inferior cutter is widely used, causing quality defects of the field fiber cutting surface.Preset congenital deficiency of fiber optic connectors, that can not be all-round connection quality is recognized.3, connector manufacturers and more plagiarism-based cold continuation understanding only stay on the surface, not a set of practical quality assurance system.4, a large area of low-quality fiber optic cable, causing the cable FTTH harsh field environments the fiber sets from the core by the tensile stress damage or even breakage. Fiber optic hot melt traditional trunk and main room building with equipment, connecting quality reliable, used in FTTH FTTH, has a congenital deficiency, a large initial investment, the continuation of low efficiency, high strength construction, especially of drop cable used 3X2's covered wire cable, fiber cladding layer diameter of 0.25mm, a huge difference between the diameter lead to contraction of hot melt tube needs huge power support, the battery capacity needs and requirements of the welding machine portability contradiction, and welding machine low-quality fiber optic cable operation, easily broken, leading to the construction progress is rather slow, even daily two staff can only weld 5, hot melt complaining leads to carriers around the city and no bulk procurement welding machine products. Based on this consideration, Sumitomo, Japan, South Korea Nisshin has introduced a hot melt connectors, the pigtails down to the end of the connector, want to protect the splice point through the structure of the connector, and 0.25 cladding layer centering to reduce costs , more than 0.2dB splice loss, and this product is written to the standard of China Telecom, after use, hot melt connectors cleaver preparation of draconian, will make the domestic cutting knife or wear the import cutter cutting failure rate is greatly improved, even exceeded 30%, and hot melt connectors disposable products, consuming enormous cost, equipment investment, the battery capacity and portability welding machine problem has not been resolved, so in addition to the operators who sell the hundreds welding machine, and no large quantities of engineering.
