ITU-T O-Series Recommendations
(last updated: 19-Sep-1997 08:34)
O Series: Specifications of Measuring Equipment
Specifications for Measuring Equipment - General
Scope and application of measurement equipment specifications covered in
Climatic conditions and relevant tests for measuring equipment.
1020 Hz reference test frequency.
Measuring arrangements to assess the degree of unbalance about earth.
Maintenance access lines.
Automatic and Semi-Automatic Measuring Systems
CCITT automatic transmission measuring and signalling testing equipment
ATME No. 2.
In-station echo canceller test equipment.
Automatic equipment for rapidly measuring stereophonic pairs and
monophonic sound-programme circuits, links and connections.
Equipment for the Measurement of Analogue Parameters
O.41 (10/94) (same as P.53)
Psophometer for use on telephone-type circuits.
Equipment to measure non-linear distortion using the 4-tone
Simple equipment to measure interruptions on telephone-type circuits.
Sophisticated equipment to measure interruptions on telephone-type
O.71 (11/88) (same as V.55 and H.13)
Impulsive noise measuring equipment for telephone-type circuits.
O.72 (10/84) (same as H.16)
Characteristics of an impulsive noise measuring instrument for wideband
Group-delay measuring equipment for telephone-type circuits.
Group-delay measuring equipment for the range 5 to 600 kHz.
Phase jitter measuring equipment for telephone-type circuits.
Phase and amplitude hit counters for telephone-type circuits.
Frequency shift measuring equipment for use on carrier channels.
Equipment for the Measurement of Digital and Analogue/Digital Parameters
Quantizing distortion measuring equipment using a pseudo-random noise
Quantizing distortion measuring equipment using a sinusoidal test signal.
Equipment for measuring the performance of PCM encoders and decoders.
General requirements for instrumentation for performance measurements on
digital transmission equipment.
Error performance measuring equipment operating at the primary rate and
Error performance measuring equipment for bit rates of 64 kbit/s and N x
Basic parameters for the measurement of error performance at bit rates
below the primary rate.
In-service code violation monitors for digital systems.
Equipment to perform in-service monitoring on 2048, 8448, 34 368 and
139 264 kbit/s signals.
Equipment to perform in-service monitoring on 1544 kbit/s signals.
Timing jitter measuring equipment for digital systems.
Equipment to assess error performance on STM-N interfaces.