From Longman Dictionary of Contemporary Englishring in phrasal verb1 British EnglishTCT to telephone the place where you work Jane’s rung in to say she’ll be late. He rang in sick (=telephoned to say he was ill) every morning for a week.2 ring in the New YearTMCCELEBRATE to celebrate the beginning of the New Year → ring→ See Verb table
Examples from the Corpus
rang in sick• Anyway, we haven't seen him for a week or so, he rang in sick.From Longman Business Dictionaryring in phrasal verb [intransitive] British English1to telephone the place where you workJane’s rung in to say she’ll be late.2ring in sick to telephone the place where you work to say that you are too ill to work → ring→ See Verb table 