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Q

QA - quality assurance

QAE - quality assurance evaluator

QAM - quadrature amplitude modulation

QASD - (Quad Asynchronous/Synchronous Data) Module - This module provides four ports that can be independently programmed to operate in either the asynchronous or synchronous mode, at various speeds, for data transmission in a network.

QAVP - (Quad Analog Voice Port) Module - This module provides support for up to four 4-wire full duplex ports that can be interfaced to either the signaling or trunking end of PBXs, central offices or channel banks. This module converts 3 kHz bandwidth analog signals to 64 kbps PCM (pulse code modulation) and vice versa.

QBRI - quad basic rate interface

QCMBR - quality of service capable multicast bi-level router

QCP - quick-connect panel

QDISPL - Queue Display

QE - quantum efficiency

QEAM - quick erect antenna mast

QED - quantum effect design

QEEM - quick erect expandable mast

QFA - quick file access

QIP - quality improvement prototype

QIP - quadritech Internet protocol

QIP - Quadritech IP Management

QMF - query management facility

QML - qualified manufacturing line

QOS - quality of service

QPSK - quadrature phase shift keying

QRA - quick reaction antenna

QRMP - quick reaction multicolor printer

QRSA - quick-reaction satellite antenna

QRSAG - quick reaction satellite antenna group

QRSS - Quasi-Random Signal Source

QSAM - queued sequential access method

QSC - quad synchronous module

QSD Module - This module supplies up to four data ports with an RS-232 interface at rates from 1.2 kbps to 19.2 kbps. The QSD-2 supports V.35 interfaces for speeds up to 56 kbps.

QSP - quad synchronous processor module

QTGM - Quad Transmission Group Multiplexer

QTY - quantity

quan - quantity

Quantizing - See companding.

Quasi-Random Signal - A signal consisting of a bit sequence which approximates a random signal.

QXP - (Quad X.21 Port) Module - This module supplies up to four independent X.21 interfaces for data communications, supporting speeds from 1200 bps to 64 kbps. It is used to interface to a leased X.21 circuit, or to provide a gateway to public X.21 networks.

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