Glossary

Material, device, or collection of parts installed in a cable pathway (such as a conduit or riser) at a fire-rated wall or floor to prevent passage of flame, smoke, or gases through the rated barrier.

Also called fish cord. A tool used by electricians to route new wiring through walls and electrical conduit.

The average number of times a particular cable or type of cable can bend before breaking.

NSN 3G Node B modular system used by MBNL

A floating circuit is one that has no ground connection.

The ISO/IEC 11801 term for horizontal cross-connect. The floor distributor is used to connect between the horizontal cable and other cabling subsystems or equipment.

Floor modules are sized 37mm x 22mm. Also known as LJ6 size. They come in Cat5e or Cat6.

A thermoplastic with excellent dielectric properties that is often used as insulation in plenum-rated cables. FEP has good electrical-insulating properties and chemical and heat resistance and is an excellent alternative to PTFE (Teflon

A method of adding information to a sine wave signal in which its frequency is varied to impose information on it. Information is sent by varying the frequency of an optical or electrical carrier. Other methods include amplitude modulation (AM) and phase modulation (PM).

The creation of new light wavelengths from the interaction of two or more wavelengths being transmitted at the same time within a few nanometers of each other. Fourwave mixing is named for the fact that two wavelengths interacting with each other will produce two new wavelengths, causing distortion in the signals being transmitted. As more wavelengths interact, the number of new wavelengths increases exponentially.

A special field used to hold error correction data in Ethernet (IEEE 802.3) frames.

A packet-switched, wide area networking (WAN) technology based on the public telephone infrastructure. Frame relay is based on the older, analog, X.25 networking technologies.

MBNL street cabinet

The transmission of optical information over air using specialized optical transmitters and receivers.

In Token Ring networks, a free token is a token bit set to 0.