Question 5/4 - Jitter and wander test and measurement techniques and instrumentation for use on transmission systems and their constituent parts
(Continuation of Question 5/4 (2001-2004) in a revised version)
- Jitter and wander test and measurement instrumentation is required for the installation,
commissioning, bringing into service and maintenance of telecommunications equipment and networks;
- measurement of the same parameter made with different measuring instruments should give reliable, repeatable and comparable results;
- new transmission technologies, services and facilities are regularly being introduced;
- network operators desire to maximize efficiency by use of automated test systems, wherever
- inter-operator links need to be efficiently installed, commissioned, brought into service
- circuits may be provided using analogue, digital and mixed analogue and digital technologies.
- maintenance of O.17x series Recommendations.
Study items to be considered include, but are not limited to:
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:
- Jitter test instrumentation to assess timing jitter, wander and network synchronization;
- jitter test instrumentation and techniques associated with narrow-band ISDN;
- jitter and wander test instrumentation and techniques associated with plesiochronous digital hierarchy (PDH);
- jitter and wander test instrumentation and techniques associated with the synchronous digital hierarchy (SDH);
- jitter and wander test instrumentation and techniques associated with broadband ISDN and ATM;
- jitter and wander test instrumentation and techniques associated with the Optical Transport Network (OTN).
- jitter and wander test instrumentation and techniques associated with IP networks and services.
The expected results of the work are amendments to existing Recommendations or new Recommendations in the O-series.
Tasks include, but are not limited to:
- Revision of Recommendation O.172 , SDH jitter and wander measurement equipment.
Completion date: 2004.
- Revision of Recommendation O.173, OTN jitter measurement equipment.
Completion date: 2005.
Co-ordination will be necessary with other working parties in ITU-T Study Groups
4, 13 and 15