also: インターフォン · インタホン · インターホーン · インタフォン · インタホーン
noun
Refers to an intercom system, commonly found in apartment buildings, offices, and homes for communication between rooms or at the entrance.
from English interphone
マンションのインターホンが鳴った。
The apartment intercom rang.
インターホンで来客を確認する。
I check visitors through the intercom.
Most common spelling; standard katakana loanword form.
Alternate spelling reflecting the English 'phone' more closely; less common but still seen.
Search-only kana form; not a standard written spelling.
電話 is a general telephone, while インターホン specifically refers to an intercom system, often for internal or entrance communication.
Loanword from English 'interphone', a blend of 'intercom' and 'telephone'. The term is widely used in Japanese for intercom systems.