In network cabling, optical cables are usually used outdoors (connections between buildings), and Ethernet twisted pairs are used indoors (inside buildings). Then, how to convert between the optical cable transmission medium outside the building and the Ethernet transmission medium in the building? What equipment is used? What is the relationship between them?
Fiber Pigtail
The outdoor optical cable is connected to the terminal box, and the optical fiber in the optical cable is spliced with the pigtail, and then led out through the jumper. The purpose of connecting optical fiber jumpers to optical fiber transceivers is to convert optical signals into electrical signals. The optical fiber transceiver leads to electrical signals, and the transmission medium used is twisted pair. At this time, the twisted pair can be connected to the RJ-45 port of the network device. So far, the photoelectric signal conversion is completed.
The relationship between optical cable, terminal box and pigtail:
The function of the optical cable and the terminal box is to terminate the optical cable, connect the fiber core and pigtail in the optical cable, the internal structure of the optical cable terminal box, and the connected optical cable can have multiple cores. A 4-core fiber optic cable, then, this fiber optic cable can be spliced with up to 4 pigtails through the terminal box, that is, 4 jumpers can be drawn out. If only 2 wires are welded, 2 jumpers will be drawn out.
Pigtail function: It is mainly used to connect the connectors at both ends of the optical fiber. One end of the pigtail is spliced with the optical fiber connector, and the other end is connected to the optical fiber transceiver or the optical fiber module through a special interface to form an optical data transmission path. Generally, we can't buy pure pigtails, but optical fiber jumpers, which become pigtails when they are cut in the middle.
