ITU-T O-Series Recommendations
(last updated: 19-Sep-1997 08:34)
O Series: Specifications of Measuring Equipment
Specifications for Measuring Equipment - General
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O.1 (05/96)
Scope and application of measurement equipment specifications covered in
the O-Series.
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O.3 (10/92)
Climatic conditions and relevant tests for measuring equipment.
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O.6 (11/88)
1020 Hz reference test frequency.
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O.9 (11/88)
Measuring arrangements to assess the degree of unbalance about earth.
Maintenance Access
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O.11 (10/92)
Maintenance access lines.
Automatic and Semi-Automatic Measuring Systems
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O.22 (10/92)
CCITT automatic transmission measuring and signalling testing equipment
ATME No. 2.
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O.27 (11/88)
In-station echo canceller test equipment.
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O.33 (07/95)
Automatic equipment for rapidly measuring stereophonic pairs and
monophonic sound-programme circuits, links and connections.
Equipment for the Measurement of Analogue Parameters
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O.41 (10/94) (same as P.53)
Psophometer for use on telephone-type circuits.
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O.42 (10/94)
Equipment to measure non-linear distortion using the 4-tone
intermodulation method.
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O.61 (11/88)
Simple equipment to measure interruptions on telephone-type circuits.
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O.62 (11/88)
Sophisticated equipment to measure interruptions on telephone-type
circuits.
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O.71 (11/88) (same as V.55 and H.13)
Impulsive noise measuring equipment for telephone-type circuits.
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O.72 (10/84) (same as H.16)
Characteristics of an impulsive noise measuring instrument for wideband
data transmissions.
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O.81 (12/72)
Group-delay measuring equipment for telephone-type circuits.
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O.82 (12/72)
Group-delay measuring equipment for the range 5 to 600 kHz.
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O.91 (11/88)
Phase jitter measuring equipment for telephone-type circuits.
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O.95 (11/80)
Phase and amplitude hit counters for telephone-type circuits.
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O.111 (11/88)
Frequency shift measuring equipment for use on carrier channels.
Equipment for the Measurement of Digital and Analogue/Digital Parameters
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O.131 (11/88)
Quantizing distortion measuring equipment using a pseudo-random noise
test signal.
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O.132 (11/88)
Quantizing distortion measuring equipment using a sinusoidal test signal.
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O.133 (03/93)
Equipment for measuring the performance of PCM encoders and decoders.
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O.150 (05/96)
General requirements for instrumentation for performance measurements on
digital transmission equipment.
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O.151 (10/92)
Error performance measuring equipment operating at the primary rate and
above.
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O.152 (10/92)
Error performance measuring equipment for bit rates of 64 kbit/s and N x
64 kbit/s.
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O.153 (10/92)
Basic parameters for the measurement of error performance at bit rates
below the primary rate.
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O.161 (10/84)
In-service code violation monitors for digital systems.
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O.162 (10/92)
Equipment to perform in-service monitoring on 2048, 8448, 34 368 and
139 264 kbit/s signals.
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O.163 (11/88)
Equipment to perform in-service monitoring on 1544 kbit/s signals.
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O.171 (10/92)
Timing jitter measuring equipment for digital systems.
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O.181 (05/96)
Equipment to assess error performance on STM-N interfaces.