Telephone Installer (Indoor Lines)
でんわこうじにん（たくないせん）
Industry & Occupation
Classification
Summary
A technical job that wires telephone lines inside homes and offices, installs modular jacks, conducts call tests, and builds and maintains indoor communication equipment.
Description
Telephone installers (indoor lines) handle wiring of telephone lines inside buildings such as homes and offices, as well as installation of modular jacks and control panel terminals, and are responsible for verifying call quality and investigating faults. They cut and strip cables using specialized tools, route lines through walls, ceilings, and under floors, and perform accurate construction based on wiring diagrams. After construction, they use test equipment to measure line characteristics and check for noise or breaks. They coordinate with site supervisors and customers, create work reports, and are also involved in maintaining communication equipment.
Future Outlook
Although demand for fixed telephone lines is declining, demand for applications in communications network wiring technology remains stable, with shifts expected toward smart home and IoT-related work.
Personality Traits
Attentive / Calm demeanor / Dexterous with hands and good at detailed work / Service-oriented
Work Style
Business Trips / Contract Employee / Dispatched Employee / Full-time Employee / Sole Proprietor / Team On-Site Work
Career Path
Apprentice Technician → Telephone Installer (Indoor Lines) → Site Leader → Telecommunications Equipment Construction Manager → Independent Business
Required Skills
Cable Handling Techniques / Crimping Tool Operation / Drilling with Drill / Modular Jack Handling / Safe Work on Ladders and Scaffolding / Use of Line Testing Equipment / Wiring Diagram Reading
Recommended Skills
LAN Wiring / Network Fundamentals / Reading English Technical Documents / VoIP Configuration
Aptitudes (Strengths Preferred)
| Item | Description |
|---|---|
| Attention to Detail & Accuracy | Because mistakes in connecting thin cables or terminals can lead to communication failures. |
| Physical Stamina & Endurance | Due to frequent long hours of wiring work, use of ladders, and work in confined spaces. |
| Problem Solving | Because it is necessary to identify and fix causes when there are line faults or noise. |
Aptitudes (Weaknesses Acceptable)
| Item | Description |
|---|---|
| Creativity & Ideation | Because construction follows standardized work procedures. |
| Numerical & Quantitative Analysis | Because advanced mathematical analysis is rarely required. |
Related Qualifications
- Second-Class Electrician
- Telecommunications Construction Supervisor
Aliases
- Indoor Communications Wiring Worker
- Telephone Wiring Worker
Related Jobs
- Cable TV Installation Technician
- Electrician
- Network Wiring Technician