Hello, I have a fiber optic connection terminated at home with a huawei echolife hg8546m router (gpon onu) and I need to move it to the attic where I have a cabinet where all the Ethernet cables connect and there will also be a gigabit switch and / or wireless router. How can I extend the optical fiber to the attic to split the signal? I mean ready-made solutions such as a fiber optic extension cable with a length of, for example, 15-20m.