Longman Dictionary of Contemporary English
call-in
noun
EXAMPLES FROM CORPUS
▪ Even if the two counties agree, this should be a matter for a call-in.
▪ In place of personal discussion and deliberation, we have call-ins, talk shows, faxes, and on-line computer bulletin boards.
Wiktionary
call-in
a. (context of a radio programme English) In which members of the public telephone the studio and talk live to the presenter. n. 1 Such a radio programme 2 Such a call 3 Such a caller
WordNet
call-in
n. a telephone call to a radio station or a television station in which the caller participates in the on-going program
Usage examples of "call-in".
Well, it was one of those call-in radio shows, and we started taking calls from Salt Lake citizens who were pissed off at an ``outsider'' coming in to tell them that Utah's not ratifying the ERA was a sinful and mischievous act.
Watched Anshiser/Vegas Hotel data line, there was call-in call-back, enough data that may be two-way one-time codes, maybe simultaneous voice monitoring and clearance.