Glossary

A type of diagnostic test in which a transmitted signal is returned to the sending device after passing through a data communications link or network. This test allows the comparison of a returned signal with the transmitted signal to determine if the signal is making its way through the communications link and how much signal it is losing upon its total trip.

A protective tube loosely surrounding an optical fiber, often filled with gel used as a protective coating. Loosetube cable designs are usually found in outdoor cables, not inside buildings.

Optical fiber that is carried loosely in a buffer many times the diameter of the fiber. Loose-buffered fiber is typically terminated with a breakout kit or a fanout kit and connected to a patch panel. Also known as loose buffer.

The attenuation of optical or electrical signal, normally measured in decibels (dB). With respect to fiber-optic cables, there are two key measurements of loss: insertion loss and return loss. Both are measured in decibels. The higher the decibel number, the more loss there is. Some copper-based and optical fiber

A calculation and allowance for total attenuation in a system that is required in order to ensure that the detectors and receivers can make intelligent decisions about the pulses they receive.

Describes a connection having poor efficiency with respect to loss of signal.

LSF (Low smoke and fume) American standard.
Many times will be confused with LSOH. LSF will reduce smoke but will still emit gases.

Ensure that the customer understands the difference between LSF and LSOH

Low Smoke Zero Halogen insulation (sheath), Also known as LSOH, LSHF, Low smoke.

Normal PVC (Polyvinyl chloride) sheaths emit dense smoke and corrosive gases when burning (max safe working temp 70°C).
LSOH emits considerably less smoke and fumes and has a safe working temp of 90°C.

LSOH cables will be used in areas of public access, such as schools, supermarkets, hospitals, etc, along fire escape routes, and where equipment is likely to suffer damage due to corrosive fumes.
Many times will be confused with LSF.

Ensure that the customer understands the difference between LSF and LSOH