What is another word for back-channel?
Pronunciation: [bˈakt͡ʃˈanə͡l] (IPA) 
Back-channel refers to an alternative communication channel used by individuals to communicate privately with each other. This term can be replaced by other synonyms such as sideline, secondary, alternative, covert, hidden, unofficial, or secret channel. These words are used in the same context where individuals prefer to communicate through a different channel other than the main communication channel. Other applicable words for back-channel include indirect, unacknowledged, and private communication. These terms reflect the need for individuals to communicate discreetly, confidentially, and behind the scenes. Whether in political, business, or personal settings, back-channel communication serves as a critical tool for building relationships and achieving objectives.
