Cisco Cisco Prisma II EDR Receiver Installation Guide

Glossary

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ONT

optical network termination. Optical network elements that terminate a network signal; also

interchangeably referred to as an optical network unit (ONU).

PID

packet identifier or program identifier.

PLL

phase lock loop. An electronic servo system controlling an oscillator to maintain a constant

phase angle relative to a reference signal.

PON

passive optical network. A system that brings optical fiber cabling and signals all or most of

the way to the end user. Depending on where the PON terminates, the system can be

described as fiber-to-the-curb (FTTC), fiber-to-the-building (FTTB), fiber-to-the-premises

(FTTP), or fiber-to-the-home (FTTH).

QAM

quadrature amplitude modulation. An amplitude and phase modulation technique for

representing digital information and transmitting that data with minimal bandwidth. Both

phase and amplitude of carrier waves are altered to represent the binary code. By

manipulating two factors, more discrete digital states are possible and therefore larger binary

schemes can be represented.

radio frequency. The frequency in the portion of the electromagnetic spectrum that is above

the audio frequencies and below the infrared frequencies, used in radio transmission systems.

RMA

return material authorization. A form used to return products.

remote terminal. Remote equipment of a supervisory system.

receive or receiver.

spectrum analyzer.