SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Apply technical knowledge of Direct Speech (DS) and Public Access Branch Exchange (PABX) Systems 
SAQA US ID UNIT STANDARD TITLE
259500  Apply technical knowledge of Direct Speech (DS) and Public Access Branch Exchange (PABX) Systems 
ORIGINATOR
SGB Aerospace Operations 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 10 - Physical, Mathematical, Computer and Life Sciences Physical Sciences 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 6  Level TBA: Pre-2009 was L6  8 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
The qualifying learner is capable of supporting and maintaining Direct Speech (DS) and Public Access Branch Exchange (PABX) systems.

Qualifying learners will be capable of:
  • Understanding PABX systems.
  • Performing routine preventive maintenance.
  • Performing corrective maintenance.
  • Analysing and monitoring system performance. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    It is assumed that a learner will be competent in:
  • Language and Communication at NQF Level 4 or equivalent.
  • Mathematics at NQF Level 4 or equivalent.
  • Physical Science at NQF Level 5 or equivalent.
  • Telecommunications theory at NQF Level 5 and equivalent. 
    		•

    UNIT STANDARD RANGE 
    Direct Speech and PABX systems include but are not limited to:
  • Interconnectivity between PABX and Satellite systems.
  • PABX fault identification to module level.
  • Operation of maintenance and control PC. 
    		•

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Understand PABX systems. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    PABX Systems are discussed in terms of its required purpose and functionality. 

    ASSESSMENT CRITERION 2 
    Direct speech (DS) Systems are explained in terms of its required purpose and functionality. 

    ASSESSMENT CRITERION 3 
    PABX architecture is explored in relation to its purpose and functionality. 

    ASSESSMENT CRITERION 4 
    Direct speech (DS) architecture is examined and described in relation to its purpose and functionality. 

    SPECIFIC OUTCOME 2 
    Perform routine preventive maintenance. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Preventive maintenance requirements are conducted as per schedule and confirmed with customers in accordance with routine maintenance schedules. 

    ASSESSMENT CRITERION 2 
    PABX and DS equipment is maintained in accordance with manufacturer's specifications. 

    ASSESSMENT CRITERION 3 
    Appropriate test equipment and tools are used to perform preventative maintenance as specified by the manufacturer. 

    ASSESSMENT CRITERION 4 
    PABX and DS service is restored and handed over to the customer according to organisational procedures. 

    ASSESSMENT CRITERION 5 
    The consequences of failing to carry out preventive maintenance are explained using examples. 

    SPECIFIC OUTCOME 3 
    Perform corrective maintenance. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Equipment failure is verified through contacts with customers and monitoring systems according to organisational procedures. 

    ASSESSMENT CRITERION 2 
    Preliminary corrective fault diagnosis is conducted using supervisory maintenance and monitoring equipment to identify the faulty PABX and DS components in accordance with manufacturer's corrective maintenance procedures. 

    ASSESSMENT CRITERION 3 
    Preliminary corrective action is conducted using supervisory maintenance and monitoring equipment to restore the PABX and DS through reset or re-configuration in accordance with the corrective maintenance procedures. 

    ASSESSMENT CRITERION 4 
    Corrective fault diagnosis is conducted using test equipment and built-in test equipment to identify faulty modules or components in accordance with corrective maintenance procedures. 

    ASSESSMENT CRITERION 5 
    Corrective action is performed and the faulty modules/components are replaced according to manufacturer's procedures. 

    ASSESSMENT CRITERION 6 
    PABX and DS service is restored and handed over to the customer according to organisational procedures. 

    SPECIFIC OUTCOME 4 
    Analyse and monitor PABX and DS systems performance. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    PABX and DS Systems performance is analysed and measured using supervisory monitoring and maintenance systems as specified in manufacturer's specifications. 
    ASSESSMENT CRITERION RANGE 
    Performance measurements include but are not limited to:
  • Testing of primary links to telecommunications service provider.
  • Testing of leased routers.
  • Monitoring and responses to alarm indications.
  • Understanding fault conditions of cards/modules/supervisory equipment.
     
    		•

    ASSESSMENT CRITERION 2 
    The performance of PABX and DS Systems is measured using portable and supervisory test equipment as per manufacturer's instructions. 

    ASSESSMENT CRITERION 3 
    Performance figures are evaluated and verified against manufacturers' specifications. 

    ASSESSMENT CRITERION 4 
    Technical reports are compiled and the status and performance of PABX and DS equipment is recorded according to organisational procedures. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • An individual wishing to be assessed (including through RPL) against this Unit Standard may apply to an assessment agency, assessor or provider institution accredited by the relevant ETQA, or an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Anyone assessing a learner against this Unit Standard must be registered as an assessor with the relevant ETQA or with an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Any institution offering learning that will enable achievement of this Unit Standard or assessing this Unit Standard must be accredited as a provider with the relevant ETQA or with an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Moderation of assessment will be conducted by the relevant ETQA at its discretion. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
  • Principles of PABX's/Telephone systems.
  • System architecture.
  • Functions: Speed dialling, pin codes, accounts.
  • Types of interfaces/services.
  • Connection to Telkom.
  • Least cost routers.
  • Connection to VSAT equipment.
  • Connection to other systems (e.g. VCCS).
  • Impact of PABX systems serviceability on the safety of air traffic services.
  • Maintenance contracts.
  • Connection of new circuits/services.
  • Circuit testing and restoration.
  • Alarm handling.
  • Module replacement.
  • System management software.
  • Fault diagnosis.
  • Preventative maintenance. 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems when carrying out fault diagnosis thereby ensuring that appropriate remedial actions are initiated for the effective restoration of failed or defective communication control systems equipment. 

    UNIT STANDARD CCFO ORGANISING 
    Employ self management by ensuring sufficient time is allocated for carrying out general housekeeping activities in addition to maintenance or repair work to equipment situated in remote locations. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information contained in data specifications for test equipment and diagnostic systems, information supplied in handbooks, maintenance schedules and performance logs to ensure optimum DS and PABX systems support and maintenance requirements. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively ensuring that information communicated via technical reports is accurately recorded in a neat and logical format that can be readily accessed and understood by end-users and that ongoing oral communication is maintained with calibration teams and Air Traffic Control during preventive or corrective maintenance operations carried out on communication control systems equipment. 

    UNIT STANDARD CCFO SCIENCE 
    Demonstrate scientific and technological competence by applying knowledge and understanding of scientific processes to the correct use of sophisticated, high technology test equipment and diagnostic systems. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by recognising that the role of the technician is a vital part of the integrated radio communication system which is used by Air Traffic Control, Airline Pilots and the flying community at large and as such should therefore not be regarded as a role which is performed in isolation of this network. 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    Supplementary Information:

    Routine maintenance schedules have been prepared and are in place for each system based on manufacturers' recommendations, operational requirements and support requirements determined from actual field experience during the operational life of the systems.

    International Civil Aviation Organisation (ICAO) recommendations publish recommendations and standards for all communications, navigational and surveillance systems used in aviation. The ICAO Annex 10 publication includes the recommendations and standards for communications systems.

    Corrective maintenance procedures include procedures contained in equipment manufacturer manuals, ICAO recommendations and site specific maintenance procedures. 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  64089   National Diploma: Communication and Navigation Systems  Level 6  NQF Level 06  Passed the End Date -
    Status was "Reregistered"     		 2016-12-31  TETA 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.