Diagram: Function and connection of fiber optic cable, terminal box, Pigtail

Because the network monitors the long-distance widespread need to use the optical fiber equipment, considers the customer to have the understanding optical fiber connection method The need, therefore below will briefly introduce the fiber optic cable, the terminal box, the tail fiber function and the connection method

The function of fiber optic cable, terminal box, Pigtail and connection method:

Connection relationship:
Step 1: Outdoor cable and cable access terminal box, the purpose is to connect the fiber in the optical cable with the pigtail, through the jumper, it leads.
Step 2: Connect the fiber optic jumper to the optical transceiver to convert the optical signal into an electric signal.
Step 3: The fiber transceiver is the electrical signal, the use of the transmission medium is twisted-pair wire. At this time the twisted pair can be connected to the RJ-45 port of the network equipment. At this end, the conversion of the optical signal is completed.

Terminal box

Terminal box function: Connect the fiber core and pigtail in the fiber optic cable, and protect the fibre end and pigtail.
The inner structure of the optical cable terminal box:

, access to the optical cable can have multi-core,
For example: a 4-core fiber optic cable (4 fiber core in the optical cable), then, the cable through the terminal box, it can be fused to the maximum of 4 pigtail, that is, the outward lead to 4 jumpers.
, only fused to 2, also led out of 2 jumpers.

The connector box is used for connecting two optical cables into a long cable.

Tail fiber

The pigtail is used in the terminal box to connect the fiber in the fiber optic cable through the terminal box Coupler (adapter) to connect the pigtail and jumper.
Generally we can not buy pure tail fiber, but the jumper, the middle of a cut, then become pigtail.

, this is a single-mode ST connector (the skin is yellow) pigtail.
Pigtail: At one end there is a connecting head, the other end is an optical fiber core breakage. It is connected with other optical fiber cores by welding.
Pigtail effect: Mainly used to connect the ends of the fiber connector. The pigtail is fused with the fiber connector at one end, and the other end is connected with the fiber transceiver or fiber module through a special joint to form the optical data transmission path.

Jumper

Both ends of the jumping fiber are active joints. The function of connecting pigtail and equipment.

Fiber coupler is used for two fiber or pigtail active connection popular known as the flange.

only one end of the tail fiber is an active connector, both ends of the jumping fiber are active joints, there are many interfaces, different interfaces require different couplers currently on the market optical fiber set transmission mode:
Single mode, sheath color is generally yellow;
Multi-mode, the sheath color is generally orange

Fiber Connection head Type:
SC,LC ' FC and other connectors are more commonly used, other such as St,mtri,mu
The range of use is smaller.

FC interface Type:
FC Connector is also called Round with threaded connector (the most used on the wiring frame), is a metal joint, generally used in the ODF side, the number of metal joints can be inserted more than plastic.

FC Interface Physical Diagram

SC interface Type:
SC Connector is also called the card-type square connector (router switch used on the most), is a standard square-type connector, the use of engineering plastics, with high temperature, not easy oxidation advantages. The transmission device side optical interface is generally used SC connector.

SC Interface Physical Diagram

LC interface Type:
LC connectors are similar in shape to SC connectors and smaller than SC connectors.

LC Interface Physical Diagram

ST connector:
St connectors are also called snap-in round joints, for 10base-f connections, the connector is usually ST type.

ST Interface Physical Diagram

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Diagram: Function and connection of fiber optic cable, terminal box, Pigtail