The phone never stops ringing because the same question usually gets an answer only from you. Which calls eat your working hours shows not in the ringing but on a tally sheet: one week, every call, with caller, request and duration. Then you see which questions repeat, which you can pre-empt and which need your conversation.
Read the full article: https://impruvement.com/blog/the-phone-never-stops-ringing-which-calls-eat-your-working