1 Scope
2 References
3 Abbreviations
4 How to use this Recommendation
5 Content of the O-series Recommendations
5.1 General Recommendations
5.1.1 Recommendation O.3 – Climatic conditions and relevant tests for
measuring equipment
5.1.2 Recommendation O.6 – 1020 Hz reference test frequency
5.1.3 Recommendation O.9 – Measuring arrangements to assess the degree of unbalance about Earth
5.2 Maintenance access
5.2.1 Recommendation O.11 – Maintenance access lines
5.3 Automatic and semi-automatic measuring systems
5.3.1 Recommendation O.22 – CCITT Automatic Transmission Measuring and signalling testing Equipment ATME No. 2
5.3.2 Recommendation O.27 – In-Station Echo canceller Test equipment
5.3.3 Recommendation O.33 – Automatic equipment for rapidly measuring
stereophonic pairs and monophonic sound-programme circuits, links and connections
5.4 Equipment for the measurement of analogue parameters
5.4.1 Recommendation O.41 – Psophometer for use on telephone-type circuits
5.4.2 Recommendation O.42 – Equipment to measure non-linear distortion using
the 4-tone intermodulation method
5.4.3 Recommendation O.61 – Simple equipment to measure interruptions on telephone-type circuits
5.4.4 Recommendation O.62 – Sophisticated equipment to measure interruptions
on telephone-type circuits
5.4.5 Recommendation O.71 – Impulsive noise measuring equipment for
telephone-type circuits
5.4.6 Recommendation O.72 – Characteristics of an impulsive noise measuring instrument for wideband data
transmissions
5.4.7 Recommendation O.81 – Group-delay measuring equipment for
telephone-type circuits
5.4.8 Recommendation O.82 – Group-delay measuring equipment for the range 5 to 600 kHz
5.4.9 Recommendation O.91 – Phase jitter measuring equipment for telephone-type circuits
5.4.10 Recommendation O.95 – Phase and amplitude hit counters for telephone-type circuits 5.4.11 Recommendation O.111 – Frequency shift measuring equipment for use on carrier channels
5.5 Equipment for the measurement of analogue/digital and digital
parameters
5.5.1 Recommendation O.131 – Quantizing distortion measuring equipment using a pseudo‑random noise
test signal
5.5.2 Recommendation O.132 – Quantizing distortion measuring equipment using a sinusoidal test signal
5.5.3 Recommendation O.133 – Equipment for measuring the performance of PCM encoders and decoders
5.5.4 Recommendation O.150 – General requirements for instrumentation for performance measurements on digital
transmission equipment
5.5.5 Recommendation O.151 – Error performance measuring equipment for digital systems at the primary bit rate
and above
5.5.6 Recommendation O.152 – Error performance measuring equipment for bit rates of 64 kbit/s and
N × 64 kbit/s
5.5.7 Recommendation O.153 – Basic parameters for the measurement of error performance at bit rates below the
primary rate
5.5.8 Recommendation O.161 – In-service code violation monitors for digital systems
5.5.9 Recommendation O.162 – Equipment to perform in-service monitoring on
2048, 8448, 34 368 and 139 264 kbit/s signals
5.5.10 Recommendation O.163 – Equipment to perform in-service monitoring on
1544 kbit/s signals
5.5.11 Recommendation O.171 – Timing jitter and wander measuring equipment for digital systems which are
based on the Plesiochronous
Digital Hierarchy (PDH)
5.5.12 Recommendation O.172 – Jitter and wander measuring equipment for
digital systems which are based on the Synchronous Digital Hierarchy (SDH)
5.5.13 Recommendation O.181 – Equipment to assess error performance on STM-N
interfaces
5.5.14 Recommendation O.191 – Equipment to measure the cell transfer
performance of ATM connections
Annex A -
Alphabetical list of measurement terms covered by O-Series Recommendations
Appendix I-Crosstalk
test device for carrier transmission on coaxial systems
I.1 Introduction
I.2 Operation
I.3 Basic technical parameters of a device designed for transmission
systems at frequencies less than 18 MHz
I.3.1 Basic characteristics
I.3.2 Several technical characteristics