Fibre optic cable construction • Fibre optic cable construction • Core • This is the physical medium that transports optical data signals from an attached light source to a receiving device. The core is a single continuous strand of glass or p...

...Shielded vs. unshielded cables • Shielded vs. unshielded cables • The environment determines whether cable should be shielded or unshielded. Quiet office environments, busy retail establishments, and individual workshops all require different levels...

...Fibre • Multimode fibre cable has a large-diameter core and therefore has multiple modes of propagation—that is, several wavelengths of light are used in the fibre core. It’s primarily used for lighter- capacity or shorter-distance applications. • M...

...wire pairs within a cable. Alien Crosstalk, in 10-GbE systems, is the measurement of the signal coupling between wire pairs in different, adjacent cables. • Factors that affect Alien Crosstalk • The amount of ANEXT depends on a number of factors...

...twisted-pair (STP) cable using either a DB9 connector or a unique square connector called the IBM data connector. Later, Token Ring was adapted to use conventional unshielded twisted-pair (UTP) cable with RJ-45 connectors. The most common kinds...

...of wire in 4-pair CAT5/CAT5e/CAT6 cable, leaving the other two pairs free to transmit power for Power over Ethernet (PoE) applications. However, Gigabit Ethernet or 1000BASE-T uses all four pairs of wires, leaving no pairs free for power. So how ca...

...money. • Computer cables can only be too short, but never too long. The same applies to networking cables. Sometimes it is just the last meter that is missing, but in many cases some kilometres are missing. A standard 10/100 or 10/100/1000 Cop...

...ratios • Within a CATx cable of a certain length, the individual pairs might have individual different lengths, caused by higher or lower twist ratios. • There are two common cable standards: • One with a 2 + 2 structure (two pairs of approximately...