ITU-T Study Group 4 - Question 5/4 (Study Period 2005-2008)

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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)

Motivation
1. Jitter and wander 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 O.17x series Recommendations.

Question

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:
1. Jitter test instrumentation to assess timing jitter, wander and network synchronization;
2. jitter test instrumentation and techniques associated with narrow-band ISDN;
3. jitter and wander test instrumentation and techniques associated with plesiochronous digital hierarchy (PDH);
4. jitter and wander test instrumentation and techniques associated with the synchronous digital hierarchy (SDH);
5. jitter and wander test instrumentation and techniques associated with broadband ISDN and ATM;
6. jitter and wander test instrumentation and techniques associated with the Optical Transport Network (OTN).
7. jitter and wander test instrumentation and techniques associated with IP networks and services.
Study objectives
The expected results of the work are amendments to existing Recommendations or new Recommendations in the O-series.
Tasks

Tasks include, but are not limited to:
1. Revision of Recommendation O.172 , SDH jitter and wander measurement equipment.
  Completion date: 2004.
2. Revision of Recommendation O.173, OTN jitter measurement equipment.

Relationships

Co-ordination will be necessary with other working parties in ITU-T Study Groups 4, 13 and 15