Black Box SCAN-LAN VI, Manual

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SCAN-LAN VI
Patch Cable — A short length of cable with modular-plug connectors
at both ends that is used to complete a cable segment.
Patch Panel — An organized concentration of modular-cable connectors
that facilitates the interconnection of cable segments.
Physical Layer — The layer that provides the mechanical, electrical,
and functional connection over a transmission medium.
Plenum — An air-handling space inside a building. Plenum cable is
certified for installation in these open spaces.
Plug — A connector designed to insert into a receptacle (jack) of a socket.
Port — An access point for data I/O.
Power Sum NEXT — A sum of the pair-to-pair NEXT coupled from all
adjacent pairs in a cable.
Protocol — A standard set of rules specifying the format, timing, and
sequencing for data transmission.
Punch-Down Block — A block of mechanical devices that is used to
connect twisted-pair cable.
PVC — Polyvinyl Chloride, a standard coating used on cables.
Receiver — The portion of a station or node that receives the data
communication.
Repeater — A device that regenerates the data signal, used to extend the
network length.
Resistance — An electrical element that impedes the flow of current,
measured in ohms.
Reversed Pair — Twisted-pair wiring error in which the polarity of one wire
pair is reversed at one end of the link. Also called tip/ring reversal.
Ring — A LAN topology in which data is passed from station to station via
a loop. Also, the designation for one conductor of a twisted-pair cable.
RJ-45 (Registered Jack) — An eight-position telephone-type connector.