(Continuation of Question 4/4 and 5/4 studied in 2005-2008)
Motivation
New transmission technologies, services and facilities are regularly being
introduced. Inter-operator links need to be efficiently installed, commissioned,
brought into service and maintained. Test and measurement instrumentation is
required for the installation, commissioning, bringing into service and
maintenance of telecommunications equipment and networks. The measurement of the
same parameter made with different measuring instruments should give reliable,
repeatable and comparable results. This question needs continuous review to take
account of technology changes and improvements of jitter and wander measurement.
The following major Recommendations, in force at the time of approval of this
Question, fall under its responsibility:
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:
- measurement and evaluation of error performance parameters and
objectives;
- test instrumentation and techniques associated with various technologies
(e.g. SDH, ATM OTN and PNT);
- test instrumentation and techniques associated with the physical layer
of optical fibre systems;
- jitter and wander test instrumentation and techniques associated with
various technologies (e.g. SDH, ATM OTN and PNT);
- test instrumentation and techniques associated with Optical Phase
modulations (ODB, DPSK, and DQPSK).
- keeping O-Series Recommendation up to date.
Tasks
Tasks include, but are not limited to:
- Revision of Recommendation O.182, OTN measurement equipment. Completion
date: 2009.
- Revision of Recommendation O.172, SDH jitters and wander measurement
equipment. Completion date: 2009.
- Revision of Recommendation O.173, OTN jitter measurement equipment.
Completion date: 2009.
- Consider need for new Recommendation on jitter and wander
instrumentation for packet-based networks.
- Consider need for new Recommendation on physical layer test
instrumentation associated with Optical Phase modulations (ODB, DPSK, and
DQPSK).
Relationships
Recommendations:
- G.81X series, G.825, G.783, G.8251, G.826X series, GR 253
Questions:
- Q6/15, Q9/15, Q11/15 and Q13/15
Study Groups:
- ITU-T SG2 on network performance
- ITU-T SG13 on IP and NGN requirements
Standardisation bodies:
- IEC TC86, Optical Interworking Forum (OIF), Internet Engineering Task
Force (IETF), IEEE.
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