The transmission medium commonly used in cabling system is twisted-pair cable (also known as twisted-pair), symmetrical cable (symmetric cable for short) and optical cable.

1. Twisted pair cable and twisted pair symmetric cable (recommended for related products: 25 pairs of five types of flame retardant twisted pair cable)

Twisted-pair wire is two copper conductor, its diameter is generally 0.4mm ~ 0.65mm, commonly used is 0.5mm. They are each wrapped in a colored insulating layer and twisted into pairs of strands according to a prescribed length. The purpose of twisting is to minimize external electromagnetic radiation and exposure to external electromagnetic interference. The stranded wires are classified or classified according to their different electrical characteristics. The SCOPE of application of twinned and twINNED symmetric cables of any class or class according to EIA/TIA.

2, optical cable (related products recommended: YIFI series products)

According to the standard of the communication industry in China, two kinds of optical fiber are 0.85μm(0.8μm ~ 0.9μm) and 1.30μm(1.25μm ~ 1.35μm) according to the working wavelength in the cabling system. Considering the core diameter of the multi-mode optical fiber (MMF), you are advised to use 50μm/125μm(class A1a specified by GB/T 12357) or 62.5μm/125μm(class A1b specified by GB/T 12357) fibers. In more demanding situations, 8.3μm/125μm mutant single-mode fiber (SMF)(fiber is BI.I specified in GB/T 9771) can also be used, of which 62.5μm/125μm gradient enhanced multi-mode fiber is more used. Because it has high optical coupling efficiency, large fiber core diameter, in the construction and installation of optical fiber alignment requirements are not high, equipped with less equipment and other advantages, and the cable in small bending or large bending, its transmission characteristics will not change too much.