RJ45 modular connectors, also known as 8P8C connectors, are used to connect computers to local area networks. The way the RJ45 connector is wired to Cat 5, 5e and 6 cables differs depending upon the type of cable required. There are straight-through cables, crossover cables...

Power over Ethernet (PoE) is a great way to power remote equipment. Typical examples of PoE include powering VoIP phones and IP video cameras. However, it may come as a shock to realize that the first PoE standard (IEEE 802.3af) was only released in 2003,...

Telephone and data circuits all use multi-core cables. ADSL lines usually use four cores that are split into two pairs, while higher specification Cat 5, 5e and 6 cables use eight cores made up into four pairs. Each pair comprises of two wires twisted together...

System administrators rarely lead quiet lives, and it would not be unusual for a typical day to be filled with a series of minor crises that have to be resolved in double-quick time. Many problems center on the network. These could include network congestion, equipment...