Should Xiamen Telecom fttp take the open line?

Ftth (Fiber to the Home) is a relatively new broadband access mode in Chinese mainland, so it is not very common. In the past, twisted-pair copper wires have been laid for a long time, and copper wires are wear-resistant and folding-resistant, so most of them are dark; Now FTTH is a new wiring, and the optical fiber is not wear-resistant and folding-resistant. If you want to take the dark line, you must rebuild it. 1, most properties disagree. 2. The construction is also difficult, and the open line is generally used. PS: If conditions permit, it is better to add a junction box. If you take dark wires, the optical fiber will be easily damaged during construction.