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E1/E3 - The European versions of T1 and T3. E1 runs at 2.048
Mbps and E3 runs at 34 Mbps.
Earth - A term for zero reference ground.
EC - European Community
ECMA - European Computer Manufacturer's Association.
A Europeantrade organization that issues its own standards and
is a member of the ISO.
EIA - Electronic Industry Association (formerly RMA or
RETMA). An association of manufacturers and users that establishes
standards and publishes test methodologies.
Electromagnetic Coupling - The transfer of energy by
means of a varying magnetic field. Inductive coupling.
Electromagnetic Field - The combined electric and magnetic
field caused by electron motion in conductors.
Electromagnetic Interference -An interfering electromagnetic
signal. Network wiring and equipment may be susceptible to EMI
as well as emit EMI.
Electrostatic - Electrical charge that exists when the
charge is at rest.
Electrostatic Coupling - The transfer of energy by means
of a varying electrostatic field. Capacitive coupling.
ELFEXT - Equal Level Far End Crosstalk
EMI - see Electromagnetic Interference.
Encoding - A means of combining clock and data information
into a self-synchronized stream of signals.
Entrance Facility - An entrance to a building for both
public and private network service cables (including antennae)
including the entrance at the building wall and continuing to
the entrance room or space.
Entrance Point - The point of emergence of telecommunications
conductors through an exterior wall, a concrete floor slab,
or from a rigid metal conduit or intermediate metal conduit.
Entrance Room - A space in which the joining of inter-
or intra-building telecommunications or networking backbone
facilities takes place. An entrance room may also serve as an
equipment room.
Equipment Room - An enclosed area housing telecommunications
and network equipment, distinguished from the telecommunications
or wiring closet by its increased complexity and presence of
active equipment.
EPDM - Ethylene-propylene-diene monomer rubber. A material
with good insulating properties.
EPR - Ethylene-propylene copolymer rubber. A material
with good insulating properties.
Ethernet - A local area network (LAN) protocol defined
in the IEEE 802.3 standard in which computers access the network
through a Carrier Sense Multiple Access / Collision Detect (CSMA/CD)
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