Translation guide
A set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network.
Referring to the ISDN telecommunications standard.
The acronym ISDN is widely used in Japanese, pronounced as individual letters.
このオフィスではまだISDN回線を使っています。
This office still uses an ISDN line.
The full Japanese translation, used in formal or technical documents.
統合サービスデジタル網は1980年代に標準化されました。
The Integrated Services Digital Network was standardized in the 1980s.
Referring to a physical ISDN connection or subscription.
Means 'ISDN line', the most natural way to refer to the connection.
ISDN回線を契約するにはどうすればいいですか？
How can I subscribe to an ISDN line?
Refers to ISDN as a service, often used by providers.
この地域ではISDNサービスが終了しました。
ISDN service has been discontinued in this area.
In Japanese, ISDN is almost always referred to by the English acronym, pronounced アイエスディーエヌ. The full Japanese term 統合サービスデジタル網 is rarely used outside of very formal or historical contexts.