Line installers and repairers need knowledge in the following areas:

• Customer and Personal Service: Providing special services to customers based on their needs.
• Telecommunications: The tools used to send messages and data.
• English Language: The meaning and use of the English language.
• Public Safety and Security: How to protect people and property.
• Education and Training: The methods of teaching and learning.
• Mechanical: The design, use, and repair of machines and tools.
• Building and Construction: The tools and methods used to construct buildings, roads, and other structures.