Glossary
IDC (insulation displacement connection)
»
An IDC allows the termination of a conductor
without stripping the conductor’s insulation.
When the conductor is inserted into the contact,
the insulation is displaced, creating contact
between the conductor and the IDC, producing
a gas-tight connection.
IEEE (Institute of Electrical and Electronics
Engineers)
»
A publishing and standards-making
body responsible for many standards used in LANs.
IEEE 802.11ac
»
An IEEE wireless networking
standard providing high-throughput wireless local
area networks (WLANs) on the 5 GHz band, with
theoretical speeds up to 6.9 Gb/s.
IEEE 802.3
»
A collection of IEEE standards defining
the physical layer and the media access control
(MAC) sublayer of the data link layer of wired
Ethernet. This is the most common local area
network specification.
IEEE 802.3an
»
A standard for 10GBASE-T
released in 2006 to provide 10 gigabit per second
transmission over balanced twisted pair cables up
to 100 meters (328 ft).
IEEE 802.3bt
»
An IEEE standard in development
which will define Power over Ethernet over four pairs
and support 10GBASE-T. The standard will define
two new tiers of PoE: Type 3 for up to 60 watts, and
Type 4 for up to 100 watts. Publication of 802.3bt is
expected in 2018.
Impedance
»
The total opposition (i.e. resistance
and reactance) a circuit offers to the flow
of alternating current. It is measured in ohms,
and the lower the ohmic value, the better the
quality of the conductor.
Insertion Loss (IL)
»
The dierence in the amount
of power received before and after something is
inserted into the circuit.
Interconnect
»
A circuit administration point, other
than a cross-connect or an information outlet, that
provides capability for routing and rerouting circuits.
It does not use patch cords or jumper wires, and
typically is a jack-and-plug device used in smaller
distribution arrangements or that connects circuits
in large cables to those in smaller cables.
ISO (International Standards Organization)
»
The
world’s largest developer and publisher of international
standards. It is a non-governmental organization
(NGO) network of national standards institutes in 157
countries, based in Geneva, Switzerland.
Jacket (also cable jacket or sheath)
»
The outer
covering applied over internal cable elements
for protection.
LAN (local area network)
»
A LAN is a computer
network covering a small physical area, generally
a single building or contiguous campus. LANs are
characterized by higher data-transfer rates
(compared to a WAN or wide area network)
and lack of leased telecommunications lines.
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