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he longest transmission distance of multi-mode is 2KM; The longest transmission distance of single-mode is 120KM.
? As optical receiving and sending model with good optical character, electrical character, date transmits steady, and it can work for long time.
? The transmission of optical mode 155M is above 30db and optical mode 1.25G is above 25db.
? As it is manufactured by assembly line with advanced jointing, model works steady ,date transmits stably, and its anti - interference is good.