false clear

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In telephone systems, a signal that (a) produces the same effect as a clear signal, (b) is caused by (a) undesired, unintentional, or accidental means, such as interference, outages, and operator errors, and (c) is not caused by usual means of disconnection, such as by a ringing off or by a user deliberately replacing the telephone handset on its hook, cradle, or switch, i.e., by a user hanging up. See alsoclearing, clear signal, disconnect, effect, error, handset, hang up, interference, offhook, onhook, operator, outage, ring off, signal, switchboard, telephone system, user.