1, look at the number of fibers, how many there are multiplied by the number of times the fiber. Such as 12-core fiber, 12 * 2 = 24 cores, 12 cores at the beginning and 12 cores at the end;
2, the number of fiber optic boxes or ODF boxes, how many multiplied by the number of times the fiber, such as 24-core fiber box (ODF), 24 * 2 = 48 cores, 24 cores at the beginning and 24 cores at the end;
No fiber in the middle of the above no joints are calculated in this way, this calculation is relatively simple, according to the number of fiber and ODF box multiplied by its multiplier can be calculated out of the total.
There is also a kind of middle joint, this is more trouble, this it is generally in the middle of the phenomenon of direct fusion fiber, such as optical fiber into the home, the home of the skin fiber with the weak well fiber fusion, many will use the direct fusion method, in the fiber optic distribution box inside the direct fusion, will not use the coupler and pigtail, only to the fusion fiber tray, used to fix the fiber fusion point.
That fusion fiber way how to count the number of fusion cores?
The first look at the composition of the fiber to the home, it consists of the following components.
① weak box, weak box inside the composition, fiber optic discs, where the use of fiber optic discs are 2 cores or 4 cores, the largest with 8 cores, some direct no fiber optic discs; plug; router; switch; cable wiring distribution frame, ONU (or optical cat) and other components
② skin fiber, this part is generally from the weak box to the weak well, many are a few floors a summary, mainly according to the floor type decision;
③ optical fiber, this part of the floor from the fiber optic distribution box to the communications room ODF cabinet, mainly composed of fiber optic cable; fiber optic cable has 6 cores, 12 cores, 24 cores, 48 cores, 72 cores, 96 cores, 144 cores, 288 cores these types of composition of fiber optic cable;
④ ODF cabinets for server rooms. The most commonly used are 576 and 720 cores;
How to calculate the fiber to the home fiber core? We calculate according to the above components, starting from the weak box, the best way is to count by horizontal, vertical, server room part.
①Horizontal part. Is the weak box to the weak well, first of all, we need to know how many cores of skin fiber is pulled, in order to know how many weak boxes on the floor, such as floor 20 weak boxes, put 20 4 core skin fiber fiber, 20 * 4 = 80 cores.
② vertical part. Mainly floor fiber optic distribution boxes, here into how many skin fiber multiplied by the number of fiber cores of the skin; such as 20 4-core skin fiber into the fiber optic distribution boxes, 20 * 4 = 80 cores;
③ the server room part. Mainly look at how many cores come in fiber optic cable is aggregated in the ODF cabinet, such as an ODF cabinet has five 144-core fiber optic cable aggregated into the cabinet, that 144 * 5 = 720 cores, why do the math, you need to consider there is a part of the floor fiber optic distribution box reserved for spare fiber.
Through the algorithm on the horizontal, vertical and server room summary of the three summed up to get the entire project needs to melt the total number of fibers. This can basically calculate the number of fiber.
In fact, or according to the site construction, whether the construction in accordance with the design drawings, if the construction in accordance with the design drawings directly in the fiber to the home system diagram can be calculated, basically how many fibers, multiplied by his multiples can be calculated, straight pull cable multiplied by 2 times, the middle jump point multiplied by 3 times, fiber optic cable fusion is basically this way to calculate the fusion fiber point.
