Glossary:

ATIS Telecom Glossary

Search Keyword By: Q

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QA

Abbreviation for quality assurance.

QAM

Abbreviation for quadrature amplitude modulation.

QC

Abbreviation for quality control.

QCI

QoS Class Identifier

QCIF

Abbreviation for quarter common intermediate format.

QOSM

Quality of Service Management

QPSK

Abbreviation for quadrature phase-shift keying.

QRS

Abbreviation for quasi-random signal. A signal consisting of a bit sequence that approximates a random signal. [T1.201-1989] The unframed QRS (QRSS, QRTS, QRW) for DS1 consists of a PRBS with a 20-stage shift register with a constraint that forces the "put to a one" when the next 14 bits in the sequence would be zeros. The QRS generates every combination… (Read More →)

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