Communications in Hong Kong comprise of a wide-ranging and sophisticated network of radio, telephone, television, Internet, and similar online services, reflecting Network Cabling Hong Kong's booming commerce and international importance.
Despite advancements in wireless technologies, many computer networks in the 21st century Hong Kong, still, rely on physical media for devices to transfer data. Thus, there exist several standard types of network cables for distinct purposes.
Born in the 1880s, "coax" was strongly known as the cable that connected TVs to home antennas. Coaxial cable is also a norm for 10 Mbps Ethernet cables. These cables have an inner copper wire enclosed by insulation and another shielding. Their stiffness induces difficulty in installing and maintaining thinnet and thicknet for network administrators.
Twisted Pair Cables
These cables eventually emerged during the 1990s in Hong Kong and worldwide, as a cabling standard for Ethernet, starting with 10 Mbps (10BASE-T, also known as Category 3 or Cat3), later followed by improved versions for 100 Mbps, and for higher speeds up to 10 Gbps (10GBASE-T). These cables contain up to eight wires twisted together in pairs to reduce the electromagnetic interference.
Modern Ethernet cables utilize the UTP wiring as it is cheap while STP cabling can be found in other networks like Fibre Distributed Data Interface (FDDI).
Fibre optic network cables basically, use glass filaments and light pulses. These cables can bend despite being made of glass. Fibre optic cables are especially useful when long distance underground or outdoor cable runs are required like in WANs and also, in office buildings where major communication traffic is common.
Long-distance communication networks more commonly use single-mode (100BaseBX standard) for its higher bandwidth capacity while local networks often use multimode (100BaseSX standard) instead due to its cheaper cost.
Most Universal Serial Bus cables in Network Cabling Hong Kong, connect a computer with an external device (keyboard or mouse), rather than to another computer. Special network adapters or dongles, however, allow indirectly connecting an Ethernet cable to a USB port. USB wires feature twisted pair pattern.
One example of the category of crossover cables is Null modem cables. A crossover cable links two same type network devices, like two PCs or two network switches.
Ethernet crossover cables were commonly used in older home networks years ago when attaching two PCs directly together. From the outside, Ethernet crossover cables appear almost identical to the ordinary cables, the only visible difference being the arrangement of colour-coded wires looming on the cable's end connector. Producers typically applied special distinguishing marks to their crossover cables for this reason. Nowadays, though most home networks in Hong Kong yet employ routers that have built-in crossover capability, dropping the need for such special cables.
Other Network Cables
Some networking professionals practice the term patch cable, to refer to any sort of straight-through network cable, being used for a temporary period. Coaxial, twisted pair and fibre optic types of patch cables exist that share the same physical characteristics as other types of network cables, although patch cables tend to be shorter.