Meaning and Usage
"内線" (ないせん) refers specifically to a phone extension within an organization, such as a company or school. It is used to connect calls internally without going through an external telephone line.
Common Contexts
You will often hear "内線" in office environments when employees communicate with each other. It is also common in hotels or large buildings where internal communication is necessary.
Typical Collocations
- 内線番号 (ないせんばんごう): extension number
- 内線電話 (ないせんでんわ): extension phone
- 内線でかける: to call via extension
Register and Politeness
"内線" is a neutral term used in both formal and informal business contexts. It is not used outside of organizational or institutional settings.
Learner Tips
Be careful not to confuse "内線" with "外線" (がいせん), which means an outside line or external call. When asking for a phone number within a company, specify "内線番号" to avoid confusion.