NZQA registered unit standard
28865 version 1
Page 1 of 4
Title
Demonstrate knowledge of diagnostics and fault finding of complex
or non-standard telecommunications access networks
Level
4
Purpose
Credits
5
This unit standard is for telecommunications workers who install
and maintain complex or non-standard telecommunications
access network installations and service systems, and covers
the underpinning knowledge for this occupation.
People credited with this unit standard are able to demonstrate
knowledge of:
–
techniques used to identify the location and cause of
faults in complex and/or non-standard
telecommunications access networks;
–
maintenance verification and/or calibration requirements
for performance verification, fault finding, testing, and
diagnostic tools, equipment, and systems used on
complex and/or non-standard telecommunications access
networks.
Classification
Telecommunications > Telecommunications - Service Delivery
Available grade
Achieved
Explanatory notes
1
This unit standard is developed for learning and assessment off-job.
2
The term knowledge is used to describe the underpinning knowledge required by
candidates to support the range of practical installation and maintenance activities
assessed by Units:
28860, Prepare for the installation of complex and non-standard telecommunications
access network systems and services;
28861, Install and commission complex and non-standard telecommunications
access network systems;
28862, Maintain, locate faults in, and verify performance of complex and nonstandard telecommunications access network systems.
3
Definitions
Complex or Non-standard – three or more components and/or services used
together in access networks or enterprise solutions systems.
Half-split – a fault location technique in which the system is continuously split in half,
and the faulty section isolated for further investigation.
Industry practice – practices that competent practitioners within the industry
recognise as current industry best practice.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
28865 version 1
Page 2 of 4
Knowledge – employing operational and theoretical knowledge of the subject matter
to interpret available information.
PTN – Protecting the Network.
QoS – Quality of Service.
Systematic testing – a fault diagnostic process in which each part of the system is
tested from one end to the other.
4
Range
Service manuals, where referenced, should be available to candidates during
assessment.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of techniques used to identify the location and cause of faults in
complex and/or non-standard access telecommunications networks.
Evidence requirements
1.1
Explain techniques used to diagnose faults on telecommunications networks in
terms how they would assist to identify the fault location.
Range
1.2
Explain techniques used to isolate faulty sub-systems on a network including
power and engineering support services.
Range
1.3
systematic testing, half-split, loop back, transposition.
Identify possible external causes of a given fault.
Range
1.5
evaluation of performance tests, built in test equipment/diagnostic
tools, systematic testing, isolation of sub-systems.
Explain techniques used to isolate a faulty component in a sub-system.
Range
1.4
techniques include but are not limited to – observation, simulation,
measurement, identification of function loss, comparison, and
previous fault data including frequency of occurrence,
manufacturers' documentation and diagnostic data, maintenance
records, trending, built-in diagnostics, alarm priority, comparison
with commissioning results.
includes but is not limited to − mechanical versus electrical, control
circuit versus power circuit, environmental influences, module
versus wiring and terminations, where alternatives listed in service
diagnostics book or service manual.
Explain the requirement to prevent diagnostics affecting the operation of
working systems.
Range
The Skills Organisation
SSB Code 100401
working systems includes – standby paths, power supplies,
interference, impedance mismatch, use of monitoring points.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
28865 version 1
Page 3 of 4
Outcome 2
Demonstrate knowledge of maintenance verification and/or calibration requirements for
performance verification, fault finding, testing, and diagnostic tools, equipment, and
systems used on complex and/or non-standard telecommunications access networks.
Evidence requirements
2.1
Explain requirements for calibration, verification, and maintenance schedules
for test and diagnostic equipment and systems.
Range
2.2
PTN, personal safety, QoS.
Explain verification and calibration methods used for test and diagnostic
equipment, systems and instrumentation in accordance with industry practice
for networks.
Range
evidence of six methods is required.
Planned review date
31 December 2020
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
16 July 2015
N/A
Consent and Moderation Requirements (CMR) reference
0003
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
28865 version 1
Page 4 of 4
Comments on this unit standard
Please contact The Skills Organisation reviewcomments@skills.org.nz if you wish to
suggest changes to the content of this unit standard.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016