ICTBWN308
Work safely on live optical fibre installations


Application

This unit describes the skills and knowledge required to work safely on a live optical fibre installation to test and commission a wavelength division multiplexing (WDM) system and to connect a splitter for fibre to the x (FTTx) deployment.

It applies to fibre technicians who engage in safe work practices as members of a team using emerging technologies to deliver very high-speed broadband capacity through the access network for the national broadband network (NBN) initiative.

No licensing, legislative or certification requirements apply to this unit at the time of publication.


Elements and Performance Criteria

Elements

Performance Criteria

Elements describe the essential outcomes

Performance criteria describe the performance needed to demonstrate achievement of the element.

1. Set up and prepare to work with live fibre

1.1 Scope work by obtaining project plan from appropriate personnel, and arrange for site access to comply with security arrangements

1.2 Identify hazards, assess work health and safety (WHS) risks, and implement control measures according to workplace procedures

1.3 Notify appropriate personnel of identified worksite safety hazards

1.4 Determine FTTx equipment, components of optical distribution network (ODN) and WDM components, from project plan, for testing and commissioning

1.5 Obtain required tools, safety equipment and materials to perform tasks safely and efficiently

1.6 Select and use required personal protective equipment, and make site safe and secure for commissioning work

2. Connect splitter input fibre to feeder cable

2.1 Identify and avoid disconnection of other services

2.2 Monitor implementation of control measures and revise as necessary

2.3 Locate feeder fibre port to be connected

2.4 Ensure power is turned off at source

2.5 Connect connectorised splitter input fibres according to manufacturer specifications

2.6 Arrange for power to be turned back on to newly connected feeder port

3. Perform live WDM commission testing of ODN installation used in FTTx network

3.1 Locate appropriate test points in ODN from manufacturer instructions for WDM testing

3.2 Test live wavelengths for WDM tests according to safety precautions

3.3 Test optical signal strengths for operating wavelengths incoming into optical network termination (ONT) and determine if signal strengths are within range of acceptable power levels

3.4 Test losses between WDM outputs and individual line multiplexers (LM) for each wavelength, and determine if within maximum and minimum power losses

3.5 Conduct all manufacturer specified acceptance tests

3.6 Record and tabulate all test results for commissioning requirements

4. Complete installation process

4.1 Seal and secure any enclosures and cabinets

4.2 Remove waste and debris from worksite and dispose of according to environmental requirements

4.3 Notify appropriate personnel of job completion and obtain sign-off

Foundation Skills

This section describes those language, literacy, numeracy and employment skills that are essential to performance, but not explicit in the performance criteria.

Skill

Description

Oral Communication

Participates in verbal exchanges with key personnel using appropriate, clear and detailed language to exchange information, ideas or solutions

Numeracy

Performs mathematical calculations to check, interpret and confirm results of system tests

Navigate the world of work

Complies with explicit policies and procedures

Interact with others

Complies with work instructions and contributes to work group discussions using accepted conventions

Supervises other cablers in training

Get the work done

Plans and implements routine tasks and workload, making limited decisions on sequencing, timing and collaboration, and seeks assistance in setting priorities

Uses the main features and functions of digital tools to complete work tasks and access information


Range Statement

Specifies different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) areincluded. It is restricted to essential operating conditions and any other variables essential to the work environment.

Operating wavelengths must include:

1310 nm

1490 nm

1550 nm.

Range of acceptable power levels must include:

-20 to + 2 dBm @ 1310 nm

-26 to -6 dBm @ 1490 nm

-11.5 to +5 dBm @ 1550 nm.

Maximum and minimum power losses must include:

23.3 dB to 15.0 dB @1310 nm

21.6 dB to 8.0 dB @1490 nm

20.9 dB to 9.5 dB @1550 nm.

Acceptance tests must include:

delay

dispersion

optical attenuation and loss measurements

optical power levels

phase.


Sectors

Telecommunications – Broadband and Wireless Networks