noun
direct telephone number; direct line
Wasei-eigo from 'dial in'; refers to a direct inward dialing number that bypasses a switchboard, common in business contexts.
wasei-eigo (Japanese-coined English), from dial in
担当者のダイアルイン番号を教えてください。
Please tell me the direct number for the person in charge.
会社の代
Please call the direct line, not the company's main number.