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FTTB FTTC FTTH FTTO FSA

FTTB Fiber to The Building 光纤到楼 
FTTC Fiber to The Curb 光纤到路边
FTTH Fiber to The Home 光纤到家
FTTO Fiber to The Office 光纤到办公室
FSA Fiber to the Serving Area 光纤到服务区

FTTB FTTC FTTH FTTO FSA