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Type of Question
Continuation of Question 4/4 (2001-2004) in a revised version.
Reasons for the Question
1) Test and measurement instrumentation is required for the installation, commissioning, bringing into service and maintenance of telecommunications equipment and networks;
2) measurement of the same parameter made with different measuring instruments should give reliable, repeatable and comparable results;
3) new transmission technologies, services and facilities are regularly being introduced;
4) network operators desire to maximize efficiency by use of automated test systems, wherever possible;
5) inter-operator links need to be efficiently installed, commissioned, brought into service and maintained;
6) circuits may be provided using analogue, digital and mixed analogue and digital technologies.
7) maintenance of the O.series Recommendations, except the O.17x Recommendations on jitter and wander measurement instrumentation.
Text of the Question
What manual and automatic test and measurement instrumentation and techniques to assess transmission performance need to be specified by ITU-T, and what should be the
specifications ?
The following are examples of instrumentation and techniques which may be studied:
Lower network layers
- Measurement and evaluation of error performance parameters and objectives;
- test instrumentation and techniques associated with various technologies (e.g. SDH, ATM and OTN);
- test instrumentation and techniques associated with the physical layer of optical fibre systems;
- test instrumentation and techniques to assess end-to-end transmission performance;
- test instrumentation and techniques to assess performance of digital leased lines;
- test instrumentation and techniques associated with transmission of digital/digital compressed video
relating, e.g., to broadband and cable TV networks;
- test access lines;
- test instrumentation and techniques to assess performance of digital subscriber lines (xDSL technology);
- test instrumentation and techniques to assess performance of WDM, DWDM and CWDM transmission systems.
Higher network layers
- Test instrumentation and techniques associated with broadband ISDN and ATM;
- test instrumentation and techniques associated with Common Channel Signalling
System No. 7;
- test instrumentation and techniques associated with the TMN;
- test instrumentation and techniques (including delay) associated with IP-based networks;
- General issues related to test instrumentation and techniques;
- Keeping O-Series Recommendations up to date.
Study objectives
The expected results of the work are amendments to existing Recommendations or new Recommendations in the O-series.
Specific task objectives
Revision of Recommendation O.191. Need for revision to be established.
Development of a new Recommendation O.iptest for test instrumentation to assess performance of transmission systems supporting IP. Completion date: 2005
Development of a new Recommendation O.otn for test instrumentation to assess performance of optical transmission systems (OTN). Completion date: 2005
NOTES
Recommendation O.191 was adopted in January 2000. The necessity to produce a revised version of this Recommendation needs to be established before further work is done.
Relationships
Coordination will be necessary with other Working Parties in ITU-T Study Group 4.
Depending on the subject of the work, coordination may be necessary with other ITU-T Study Groups, e.g. Study Groups 9, 11, 12, 13, 15 and 17.
Other bodies: ATM Forum, Optical Interworking Forum (OIF), Internet Engineering Task Force
(IETF)
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