Translation guide
In Japanese, the concept of a 'telephone line' can refer to the physical wire, the connection itself, or the phone number. The most common and natural expressions depend on context.
Referring to a telephone line as a means of contact, often synonymous with a phone number or connection.
The telephone lines are busy.
I had a new telephone line installed.
More technical, explicitly meaning 'telephone line' or 'phone circuit'. Used in contexts like internet connections or business phone systems.
Connect to the internet using a telephone line.
Short for 'line' or 'circuit', often used in compounds. Can refer to telephone lines, internet lines, etc.
The line is unstable.
Referring to the actual physical wire that carries telephone signals.
A separate telephone line used for a specific purpose.
While 'telephone line' can be directly translated as 電話回線 or 電話線, in many everyday situations, simply using 電話 is more natural. For example, 'The line is busy' is 電話が混み合っています, not 電話回線が混み合っています.
The line is busy.
Run the telephone line along the wall.
The telephone and internet are on separate lines.