...fibre optic devices and cable to filter the strength of the fibre optic signal. Depending on the type of attenuator attached to the devices at each end of the fibre optic cable, you can diminish the strength of the light signal a variable amount, me...

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...

...pairs. NEXT (Near-end crosstalk) is the level of interference that occurs between one pair and another pair within a four-pair cable. TSB-67 requires that pair-to-pair NEXT be measured on all pair combinations in a cable. The worst pair-to-pair NE...

...Optic Mode-Conditioning Cable • Fibre Optic Mode-Conditioning Cable • Use Fibre Optic Mode-Conditioning Cable for Gigabit Ethernet longer than 550 meters • You can run Gigabit Ethernet over up to 2-km-long multimode fibre optic cable. However, the t...

...up to 126 devices across shared media, and it offers shared bandwidth. Two ports on the loop establish a point-to-point, full-duplex connection through arbitration among all ports. • The cross-point or fabric-switched topology uses 24-bit addre...

...after failure, only cross-network data is lost; internetwork data remains intact. • Great performance over Long Distance • Although some network architectures promise speeds much faster than FDDI—Gigabit Ethernet boasts a cool 1000 Mbps, for ins...

...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...

...cabling is good, solid cable for 100-Mbps LANs. The Category 5 standard has been around since 1991, so it’s well established. You’ll find existing Category 5 installations everywhere. What can Category 5 cable do, and what can’t it do? • If you sti...

Crosstalk • Crosstalk • Near-End Crosstalk (NEXT) • One 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...