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TELL-ALL INDICATOR Tired of paying big bucks for "standards of the industry" test, talk or tracing products when what your really want is superior functionality and value? Test-Um products for talking, testing and tracing give you more features and better performance for less money. Test-Um sets new standards for talk sets and tone tracing equipment. So don't hang on to old "standards" when the future of talk, test and tracing can be had from Test-Um today. The Tell-All Indicator identifies telephone and data lines 10Base-T, Token Ring and 100MBit. It is supplied with a built-in battery.