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WORD GLOSSARY
42A Block
Anode
Bi-Color LED
Cathode
Current
Dial Tone
Diode
E.I.A. Standard T568A
E.I.A. Standard
T568B or AT&T 258A
FCC
Ground
Hertz
LED
Modular Cable
Modular Jack
Modular Plug
PC Board
Polarity
Positive
Pulse
Ring
RJ-11
RJ-45
TelCo
Tip
USOC
USOC 4
Voltage
A terminal block that provides telephone line junctions.
The positive terminal of a diode or other polarized component.
A component that combines two dice of different colors upon a single substrate or lead-frame
carrier.
The negative terminal of a diode or other electronic component.
Transport of electrons through a conductor and measured in amps.
A 350 and 440 hertz tone that is imposed on the line when the phone is first taken off the hook.
An electronic component that rectifies AC to DC. Used for signal detection.
The Electronic Industries Association established this sequence as a "commercial building
specification".
Designed for data transmission.
Federal Communications Commission. A U.S. Government agency that regulates and monitors
the domestic use of the electromagnetic spectrum for communications.
An electrical connection to the earth of the a common conductor which is connected to the earth.
The basic unit for frequency or cycles per second.
(Light Emitting Diode) A semiconductor diode emitting incoherent light at its P-N junction when
forward biased.
A telephone cable with modular plugs used to connect phones or devices to the system.
The female connector of a telephone outlet.
The male connector that plugs into a modular jack.
Printed Circuit Board that has copper traces for conducting circuits to components.
Refers to positive (+) and negative (–) poles of a voltage source.
The plus (+) pole of a battery DC supply or other polarity-sensitive item.
A short signal.
The name of one conductor of a telephone line pair, identified by R. Most often the red wire and
the most negative of the two wires.
A designation given to modular plugs and jacks capable of handling 1 to 3 phone lines.
A designation given to modular plugs and jacks, similar to an RJ-11, but larger and capable of
handling 1 to 4 lines.
Abbreviation for telephone company.
The name of one conductor of a telephone line pair, identified by T. Most often the green wire and
the most positive of the two wires.
A universal service code derived from Bell System specifications.
Refers to two pairs or lines on an RJ-11 jack.
Electrical potential difference measured in volts.
Elenco Electronics, Inc.
150 W. Carpenter Avenue
http://www.elenco.com
e-mail: elenco@elenco.com
Wheeling, IL 60090
(847) 541-3800
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