call in

Pay a brief visit.

Cause to be returned.

Demand payment of (a loan).

Make a phone call.

“call in to a radio station”

“call in sick”

Summon to a particular activity or employment.

Summon to enter.

Take a player out of a game in order to exchange for another player.

A telephone call to a radio station or a television station in which the caller participates in the on-going program.