...of the most important cable measurements is Near-End Crosstalk (NEXT). It’s signal interference from one pair that adversely affects another pair on the same end. Crosstalk occurs between adjacent wire pairs (“pair-to-pair NEXT”). In addition, all...

...Fibre optic cable not only gives you immunity to interference and greater signal security, but it’s also constructed to insulate the fibre’s core from the stress associated with use in harsh environments. • Fibre cable contains a coating...

...within a loose-tube cable. It can be a headache-inducing task if you don’t have the right tools. If you bend the cable or buffer tubes past their recommended bend radius, or if you allow them to kink, you’ll end up with substandard cable connect...

...Bending a fibre cable • One of the most important considerations when installing fibre optic cable is maintaining the minimum bend radius. Bending a fibre cable excessively may cause the optical signal to refract and escape through the cladd...

Black Box Explains: Networking Standards • As a result of research done at Xerox Corporation in the early 1970s, Ethernet has evolved into the most widely implemented physical and Data link layer protocol today and, in 1978, the International ...

...devices, modems and communications lines. • What layer does it operate on? • Sometimes network devices are described as being, for instance, Layer 2 devices or Layer 3 devices. This describes which OSI layer the device operates on. Et...

...interruptions. According to an IBM® study, the average system is hit by 120 power disturbances per month. • More common than you may know • Have you ever had to reset the clock on your VCR or seen the lights dim for a moment when the refriger...