The difference between some connectors commonly used in fiber optic connections
The difference between some commonly used connectors in optical fiber links such as optical fiber distribution frame, terminal box, fiber distribution box, ODF distribution frame, I believe that many friends have been or have been confused. Today Let's discuss this topic.
If we sort out the functions of these four connectors, we find that they can be unified into the following 4 points:
①The fixed functional optical cable enters the rack, its outer sheath and reinforcing core shall be mechanically fixed, ground wire protection parts shall be installed, end protection treatment shall be carried out, and the optical fibers shall be grouped and protected.
②The splicing function, the optical fiber drawn from the optical cable is spliced with the tail cable, the excess optical fiber is coiled and stored, and the spliced joint is protected.
③The adaptor and connector can be flexibly inserted and removed; the optical path can be freely adjusted and tested.
④ Appropriate space and method meet the requirements of minimum bending radius.
There is really no big difference in the functions implemented by these four connectors. Of course, there is not much difference in this point, there are still differences in other places, otherwise there are four names, right? So where does "other places" mean? This is the focus of our discussion today.
Optical fiber distribution frame (rack type)
Conventional port number: 24 ports, 48 ports
Use environment: standard cabinet
The optical fiber distribution frame is used to connect the vertical backbone and the horizontal optical cable. It is generally a 19-inch rack with a height of 1U, and usually has at least 12 ports.
Terminal box
Conventional port number: 8 ports, 12 ports
Use environment: wall or desktop
The optical fiber terminal box is usually placed at the end of the horizontal optical cable. The equipment connected by the optical jumper from the optical fiber terminal box through the coupler is the nearest plug point to the terminal (switching equipment or PC), usually 8 ports .
Fiber distribution box
Conventional port number: 24 ports, 48 ports
Use environment: in the corridor
The optical fiber distribution box is an interface device used to connect the backbone optical cable and the distribution optical cable outdoors, in the corridor or indoors. Commonly used in the laying of optical networks in FTTH all-optical networks. It is also a small box that we can often see in the corridor in our daily life.
Conventional port number: 12-1440 core
Use environment: large-scale optical fiber wiring such as computer room, regional wiring, residential area FTTH, etc.
ODF (Optical Distribution frame) is an optical fiber distribution equipment specially designed for optical fiber communication equipment rooms. It has optical cable fixing and protection functions, optical cable termination functions, cable adjustment functions, optical cable core and pigtail protection functions. The equipment is flexible in configuration, simple in installation and use, easy to maintain, and easy to manage. It is an indispensable equipment for fiber optic communication and fiber optic cable network terminals or relay points to realize fiber arranging, jumper fiber optic cable fusion and access.
In summary, you must have noticed that the difference between fiber distribution frame, terminal box, fiber distribution box, and ODF distribution frame is mainly in two points: 1. The number of interfaces is different. 2. The use environment is different. Regardless of the four of them seem to be very complicated, the real role they actually play is a bracket of the coupler, and they themselves do not participate in data transmission. It just serves the places that need them according to the application environment and the required ports.
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