Call Us +44 0207 378 1400

clarity and precision


Search for glossary terms (regular expression allowed)
Term Main definition
The European version of T-1 data circuits. Runs at 2.048Mbps.
Hits - 1514
The European version of T-3 data circuits. Runs at 34.368Mbps.
Hits - 1988
A term for zero reference ground (not to mention the planet most of us live on).
Hits - 1721
Edge-emitting LED
An LED that produces light through an etched opening in the edge of the LED.
Hits - 1637

Everything Everywhere joint venture between Deutsche Telecom (T-Mobile UK) and France Telecom (Orange UK)

Hits - 2550
Effective modal bandwidth (EMB)
The bandwidth of a particular optical fiber cable, connections and splices, and transmitter combination. This can be measured in a complete channel.
Hits - 1934
Effective modal bandwidth, calculated (EMBc)
The calculation of the EMB from the optical fiber
Hits - 1693
Effective modal bandwidth, minimum (min EMB)
The value of bandwidth used in the IEEE 802.3ae model that corresponds to the fiber specification.
Hits - 1450
EIA rack
A rack with a standard dimension per EIA. See also 19-inch racks.
Hits - 1787
Electromagnetic compatibility (EMC)
The ability of a system to minimize radiated emissions and maximize immunity from external noise sources.
Hits - 1334
Electromagnetic field
The combined electric and magnetic field caused by electron motion in conductors.
Hits - 1795
Electromagnetic immunity
Protection from the interfering or damaging effects of electromagnetic radiation such as radio waves or microwaves.
Hits - 1308
Electromagnetic interference (EMI)
Electrical noise generated in copper conductors when electromagnetic fields induce currents. Copper cables, motors, machinery, and other equipment that uses electricity may generate EMI. Copper-based network cabling and equipment are susceptible to EMI and also emit EMI, which results in degradation of the signal. Fiber-optic cables are desirable in environments that have high EMI because they are not susceptible to the effects of EMI.
Hits - 1324
Electronic Industries Alliance (EIA)
An alliance of manufacturers and users that establishes standards and publishes test methodologies. The EIA (with the TIA and ANSI) helped to publish the ANSI/ TIA/EIA-568-B cabling standard.
Hits - 1549
Electrostatic coupling
The transfer of energy by means of a varying electrostatic field. Also referred to as capacitive coupling.
Hits - 1673