1. Crosstalk- is any phenomenon by which a signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel. 2. Waveguides- is a structure that guides waves, such as electromagnetic waves or sound waves. 3. FTTH- is a generic term for any broadband network architecture using optical fiber to provide all or part of the local loop used for last mile telecommunications. 4. Simplex- is a simplex that is also a regular polytope. 5. Half-Duplex- system provides communication in both directions, but only one direction at a time (not simultaneously). 6. Full- Duplex- system, or sometimes called double-duplex, allows communication in both directions, and, unlike half-duplex, allows this to happen simultaneously. 7. Photodiode- is a type of photo detector capable of converting light into either current or voltage, depending upon the mode of operation. 8. Amplitude Modulation- is a modulation technique used in electronic communication, most commonly for transmitting information via a radio carrier wave. 9. Analog Transmission- is a transmission method of conveying voice, data, image, signal or video information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that of a variable. 10. Digital Transmission- is the physical transfer of data (a digital bit stream) over a point-to-point or point-to-multipoint communication channel. 11. Sample Rate- defines the number of samples per unit of time (usually seconds) taken from a continuous signal to make a discrete signal. 12. Electromagnetic Wave- is a form of radiant energy, propagating through space via photon wave particles. 13. Refraction- is the change in direction of a wave due to a change in its transmission medium. 14. Medium- is the part of the medium frequency (MF) radio band used mainly for AM radio broadcasting. 15. Total Internal Reflection- is a phenomenon that happens when a propagating wave strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface. 16. Fresnel Reflection- describes the behavior of light when moving between media of differing refractive indices. 17. Tensile Strength- measures the force required to pull something such as rope, wire, or a structural beam to the point where it breaks. 18. Dispersion- dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency. 19. Bandwidth- is a measurement of bit-rate of available or consumed data communication resources expressed in bits per second or multiples of it. 20. Polarity- is defined as having two opposite tendencies or opposite electrical charges. 21. Absorption- of electromagnetic radiation is the way in which the energy of a photon is taken up by matter, typically the electrons of an atom. 22. Scattering- is a general physical process where some forms of radiation, such as light, sound, or moving particles. 23. Equilibrium Mode Distribution- of light travelling in an optical waveguide or fiber is the distribution of light that is no longer changing with fiber length or with input modal excitation. 24. Personal Protective Equipment- refers to protective clothing, helmets, goggles, or other garments or equipment designed to protect the wearer's body from injury. 25. Good Work Habits- Be the do-er, Responsibility, Proactive, Team player, Active learner, and Organized and driven.