Fiber jumper connector classification:

FC fiber jumper: The external strengthening method is a metal sleeve, and the fastening method is a turnbuckle. Generally used on the ODF side (the most used on the patch panel)

SC optical fiber jumper: the connector for connecting the GBIC optical module, its shell is rectangular, and the fastening method is the plug-in type, which does not need to be rotated. (Most used on router switches)

ST optical fiber jumper: commonly used in optical fiber distribution frame, the outer shell is round, and the fastening method is turnbuckle. (For 10Base-F connections, the connectors are usually ST type. Often used in fiber optic distribution frames)

LC fiber jumper: A connector for connecting SFP modules, it is made with a modular jack (RJ) latch mechanism that is easy to operate. (commonly used by routers)

MT-RJ fiber optic patch cord: a square fiber optic connector with integrated transceiver, one dual fiber transceiver integrated

ST and SC connectors are often used in general networks. After the ST head is inserted, it is fixed with a bayonet in half a circle, but the disadvantage is that it is easy to break; the SC connector is directly inserted and unplugged, which is very convenient to use, but the disadvantage is that it is easy to fall out; It is reliable and dust-proof, but the disadvantage is that the installation time is slightly longer. MTRJ type fiber optic patch cord consists of two high-precision plastic molded connectors and fiber optic cables. The outer parts of the connector are precision plastic parts, including a push-pull plug-in clamping mechanism. Suitable for indoor applications in telecommunication and data network systems.

Fiber optic modules: generally support hot swap, the fiber interface used by GBIC is mostly SC or ST type; SFP, namely: small package GBIC, the fiber used is LC type.

Fiber used:

Single mode: L wavelength 1310 single mode long distance LH wavelength 1310,1550

Multimode: SM wavelength 850

SX/LH indicates that single-mode or multi-mode fiber can be used

In the label indicating the pigtail connector, we often see "FC/PC", "SC/PC", etc. The meanings are as follows

1 The front part of "/" indicates the connector model of the pigtail

The "SC" joint is a standard square joint, which is made of engineering plastics, which has the advantages of high temperature resistance and not easy to be oxidized. The optical interface on the side of the transmission equipment generally uses the SC connector

The "LC" connector is similar in shape to the SC connector, but smaller than the SC connector.

The "FC" connector is a metal connector, which is generally used on the ODF side. The number of pluggable and unpluggable metal connectors is more than that of plastic.

There are many varieties of connectors, in addition to the three types described above, there are MTRJ, ST, MU, etc.

2. The back of '/' indicates the cross-section process of the optical fiber connector, that is, the grinding method

"PC" is the most widely used in the equipment of telecom operators, and its joint section is flat.

The attenuation of "UPC" is smaller than that of "PC". It is generally used for equipment with special needs. Some foreign manufacturers use FC/UPC for the internal jumper of ODF racks, mainly to improve the indicators of ODF equipment itself.

In addition, the "APC" model is more widely used in radio and television and early CATV. Its pigtail head adopts an inclined end face, which can improve the quality of the TV signal. The main reason is that the TV signal is analog light modulation. When the connector is coupled When the face is vertical, the reflected light returns along the original path.

Due to the uneven distribution of the refractive index of the fiber, it will return to the coupling surface again. At this time, although the energy is small, the noise cannot be completely eliminated by the analog signal, so it is equivalent to superimposing a weak signal with time delay on the original clear signal. The performance on the screen is ghosting. The inclination of the pigtail headband prevents the reflected light from returning along the original path. General digital signals generally do not have this problem.