In a building, a centralized space for telecommunications equipment that serves the occupants of the building.
Note: An equipment room is considered distinct from a telecommunications closet because of the nature or complexity of the equipment housed by the equipment room. [After ANSI/TIA/EIA-568A]

The portion of a device that is directly connected to facilities internal to a station, such as the data terminal equipment (DTE) side of the DTE/data-circuit-terminating (DCE) interface, switches, and user end instruments.

A mass, or bonded masses, of conducting material that offer a negligible impedance to current flow.
Note: Equipotential ground planes may be in direct contact with the earth or may be physically isolated from the earth and suitably connected to it.

An implementation-defined relation between the values of MAC labels or of Information Labels. Two labels are equivalent if each of the labels dominates the other [POSIX.6].

A standard cross section of cable conductors for use in equating the metallic content of cable conductors of all gauges to a common base. [47 CFR Pt.36-A]

1. In a system, a network that may replace another network without altering the performance of the system.
2. A network with external characteristics that are identical to those of another network.
3. A theoretical representation of an actual network.

A quantitative representation in resistance units of the spectral density of a noise-voltage generator, given by Rn = (Wn)/(kT0), where Wn is the spectral density, k is Boltzmann's constant, T0 is the standard noise temperature (290 K), and kT0 =
4. 00 × 10-21 watt-seconds.
Note: The equivalent noise resistance in terms of the mean-square noise-generator voltage, e2, within a… (Read More →)

The temperature, usually expressed in kelvins, of a hypothetical matched resistance at the input of an assumed noiseless device, such as a noiseless amplifier, that would account for the measured output noise. [From Weik '89]

The product of sheath kilometers and the number of equivalent gauge pairs of conductors in a cable. [47 CFR Pt.36-A]

The amount of thermal noise power on a frequency-division multiplexed (FDM) or wire channel necessary to approximate the same judgment of speech quality created by quantizing noise in a PCM channel.
Note 1: The speech quality judgment is based on comparative tests.
Note 2: Generally,
3
3. 5 dBrnC ±
2. 5 dB is considered the approximate equivalent PCM noise… (Read More →)