During initial phone screen, is it acceptable to politely decline to speak about salary expectations?

Basically the title. We all know phone screens are really for the company to decide whether to waste time on you. In every phone screen i’ve been a part of I’ve been asked what my salary expectations would be. The only problem is the person conducting the phone screen can barely tell you much about the role. My question is is it a red flag if I decline to talk about salary expectations until a further interview where I know more about the specific responsibilities, accountabilities and expectations?