The opposite of "called signals" could refer to the absence of communication or indication. Words that could be used as antonyms include: silence, quiet, stillness, mute, motionless, inaction, and calm. Indicating signals could be replaced with misleading signals, false signals, or even non-indicative signals. Sometimes, the lack of a call signal can signify a sense of peace or tranquility, which can be helpful in certain situations. Antonyms for "called signals" can expand our vocabulary and help us to understand language from different perspectives.