8) This describes the essential skills and knowledge and their level, required for this unit. Evidence shall show that knowledge has been acquired of safe working practices and fault finding and repairing in telecommunication apparatus and systems. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EH133A Telecommunication apparatus and system fault finding and repair Evidence shall show an understanding of telecommunication apparatus and system fault finding and repair, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects: T1. Telephone system fundamentals The transmission of sound in a telephone system encompassing: Function of telephone transmitters and receivers Components and functions of the telephone Purpose of earthing and protection in a telephone system Customer Switching Systems encompassing: Basic function Difference between a key system and a PABX. Advanced features Basic operations of System Distribution Frames (SDF)/Test Point Frames (TPF), power fail and line interface requirements (e.g. Indial, Rotary Groups, ISDN, Extension, Tie-line circuits) Types, purpose, use, and requirements of metering devices. Metering and installation arrangements of public/pay phones Installation methods and requirements encompassing: Customer Switching Systems (CSS) Interfacing equipment Termination of CSS equipment Requirements for programming of CSS Hazard associated the electronic components of CSS encompassing: Static discharge Chemical damage Mechanical damage Electromagnetic Interference T2. Telephone network facilities Network subsystems (i.e. functional blocks) components and operating parameters Switches within the network Customer accesses infrastructure System security T3. Telecommunication earthing and protection Telecommunication overvoltage protection system Operating principles Overvoltage and surge/spike suppression protection techniques Overvoltage protection devices Installation of overvoltage protection systems Earthing protection system encompassing: Components and arrangement of the MEN system TELEX functional earth system Telecommunication system earthing single and multi-storey Communication earth system Protective earth barriers for segregation, cable tray, duct and metal equipment enclosures Electrical interference encompassing: Types – RFI, EMI Sources of interference Techniques in reducing interference Earthing cable shields Earth testing instruments and procedures Safety issues to be considered with earthing and bonding T4. PABX fundamentals Programming methods Configuration options Programming options T5. Switches, hubs and routers Purpose and function Circuit configurations Connection arrangements System protocols T6. Decoders Purpose and function Circuit configurations Connection arrangements System protocols T1. Fault finding and repair Typical faults, their symptoms and cause Fault diagnosis procedures and testing Component replacement System adjustments |