Instruction manual

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