ring in

listen to the pronunciation of ring in
English - English
To make a phone call to one's usual place of work

John has just rung in sick. He won't be back til Monday, he says.

inform, give information
If you ring in, you phone a place, such as the place where you work. Cecil wasn't there, having rung in to say he was taking the day off
An outsider

But I couldn't get into an underground contract party because I'm a ring-tail, or ring-in. That means an outsider, one not born in Broken Hill.

A replacement, made at the last minute, usually in a sporting context
ring in
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