ITU-T O-Series Recommendations

(last updated: 19-Sep-1997 08:34)
 

O Series: Specifications of Measuring Equipment

Specifications for Measuring Equipment - General

  1. O.1 (05/96)
    Scope and application of measurement equipment specifications covered in the O-Series.
     
  2. O.3 (10/92)
    Climatic conditions and relevant tests for measuring equipment.
     
  3. O.6 (11/88)
    1020 Hz reference test frequency.
     
  4. O.9 (11/88)
    Measuring arrangements to assess the degree of unbalance about earth.

Maintenance Access

  1. O.11 (10/92)
    Maintenance access lines.

Automatic and Semi-Automatic Measuring Systems

  1. O.22 (10/92)
    CCITT automatic transmission measuring and signalling testing equipment ATME No. 2.
     
  2. O.27 (11/88)
    In-station echo canceller test equipment.
     
  3. 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

  1. O.41 (10/94) (same as P.53)
    Psophometer for use on telephone-type circuits.
     
  2. O.42 (10/94)
    Equipment to measure non-linear distortion using the 4-tone intermodulation method.
     
  3. O.61 (11/88)
    Simple equipment to measure interruptions on telephone-type circuits.
     
  4. O.62 (11/88)
    Sophisticated equipment to measure interruptions on telephone-type circuits.
     
  5. O.71 (11/88) (same as V.55 and H.13)
    Impulsive noise measuring equipment for telephone-type circuits.
     
  6. O.72 (10/84) (same as H.16)
    Characteristics of an impulsive noise measuring instrument for wideband data transmissions.
     
  7. O.81 (12/72)
    Group-delay measuring equipment for telephone-type circuits.
     
  8. O.82 (12/72)
    Group-delay measuring equipment for the range 5 to 600 kHz.
     
  9. O.91 (11/88)
    Phase jitter measuring equipment for telephone-type circuits.
     
  10. O.95 (11/80)
    Phase and amplitude hit counters for telephone-type circuits.
     
  11. O.111 (11/88)
    Frequency shift measuring equipment for use on carrier channels.

Equipment for the Measurement of Digital and Analogue/Digital Parameters

  1. O.131 (11/88)
    Quantizing distortion measuring equipment using a pseudo-random noise test signal.
     
  2. O.132 (11/88)
    Quantizing distortion measuring equipment using a sinusoidal test signal.
     
  3. O.133 (03/93)
    Equipment for measuring the performance of PCM encoders and decoders.
     
  4. O.150 (05/96)
    General requirements for instrumentation for performance measurements on digital transmission equipment.
     
  5. O.151 (10/92)
    Error performance measuring equipment operating at the primary rate and above.
     
  6. O.152 (10/92)
    Error performance measuring equipment for bit rates of 64 kbit/s and N x 64 kbit/s.
     
  7. O.153 (10/92)
    Basic parameters for the measurement of error performance at bit rates below the primary rate.
     
  8. O.161 (10/84)
    In-service code violation monitors for digital systems.
     
  9. O.162 (10/92)
    Equipment to perform in-service monitoring on 2048, 8448, 34 368 and 139 264 kbit/s signals.
     
  10. O.163 (11/88)
    Equipment to perform in-service monitoring on 1544 kbit/s signals.
     
  11. O.171 (10/92)
    Timing jitter measuring equipment for digital systems.
     
  12. O.181 (05/96)
    Equipment to assess error performance on STM-N interfaces.