Glossary
| Term | Main definition |
|---|---|
| Polypropylene |
A thermoplastic material that is similar to polyethylene,
which is somewhat stiffer and has a higher softening
point (temperature), with comparable electrical
properties.
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| Polyvinyl chloride (PVC) |
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| POTS Plain old telephone service | The basic service that supplies standard single-line telephones, telephone lines, and access to the public switched network; it only receives and places calls and has no added features like call waiting or call forwarding.
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| Potting |
The process of sealing by filling with a substance to
exclude moisture.
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| Power brownout |
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| Power level |
The ratio between the total power delivered to a circuit,
cable, or device and the power delivered by that device
to a load.
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| Power overage |
Occurs when too much power is coming into a piece of
equipment. See also power spike and power surge.
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| Power ratio |
The ratio of power appearing at the load to the input
power. Expressed in decibels.
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| Power sag |
Occurs when the power level drops below normal and
rises to normal in less than one second.
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| Power spike |
Occurs when the power level rises above normal and
drops back to normal for less than a second. See also
power overage and power surge.
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| Power sum |
A test method for cables with multiple pairs of wire
whereby the mathematical sum of pair-to-pair crosstalk
from a reference wire pair is measured while all other
wire pairs are carrying signals. Power-sum tests are necessary
on cables that will be carrying bidirectional signals
on more than two pairs. Most commonly measured
on four-pair cables.
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| Power surge |
Occurs when the power level rises above normal and
stays there for longer than a second. See also power overage
and power spike.
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| Power underage |
Occurs when the power level drops below the standard
level. Opposite of power overage.
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| Power-sum alien attenuation-to-crosstalk ratio, far end |
The ratio of the attenuation (signal) to the power-sum
measurement of alien crosstalk in the far end (noise);
a requirement of ANSI/TIA-568-C.2 for Category 6A
cables.
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| Power-sum attenuation-to-crosstalk ratio, far end |
The ratio of attenuation to power-sum far-end crosstalk;
a requirement of ANSI/TIA-568-C.2; formerly known as
power-sum equal-level far-end crosstalk (PSELFEXT)
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