In network wiring, optical cables are usually used outdoors (connections between buildings), and Ethernet twisted-pair cables are used indoors (inside buildings). So, how to switch between the optical cable transmission medium outside the building and the Ethernet transmission medium inside the building? Among them, what equipment is used? What is the relationship between them?

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 after the jumper. Connect the optical fiber jumper to the optical fiber transceiver, the purpose is to convert the optical signal into an electrical signal. 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 conversion of the photoelectric signal has been completed.

The relationship between optical cable, terminal box and pigtail:

The function of the optical cable and terminal box is to terminate the optical cable, connect the 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 through the terminal box, you can splice up to 4 pigtails, that is, 4 jumper wires are led out. If only 2 wires are welded, 2 jumper wires are also led out.

Pigtail function: mainly used to connect the connectors at both ends of the optical fiber. One end of the pigtail is fusion spliced with the optical fiber connector, and the other end is connected to the optical fiber transceiver or optical fiber module through a special interface to form an optical data transmission path. Generally, we cannot buy pure pigtails, but optical fiber jumpers, which become pigtails as soon as the middle is cut.