Definition of call ins:
(v) :
(intransitive, copulative) To communicate with a base etc, by telephone.
(v) :
(transitive) To report; communicate (a message) by telephone or similar.
(v) :
(intransitive) To pay a short visit.
(v) :
(transitive) To summon someone, especially for help or advice.
(v) :
(transitive) To withdraw something from sale or circulation.
(v) :
(transitive) To request immediate repayment of (a debt).