It depends, the ANSI/EIA/TIA 568-B.3 specification states that an acceptable loss of less than 0.75-dB loss for connectors and 0.3-dB loss for splices constitute acceptable or good events. TRACETEK recognizes losses down to about 0.3 dB. So TRACETEK may "miss" characterizing some very good splices as events, but will characterize bad events. Depending on its specifications, an OTDR will probably classify almost all good and bad events. That is why TRACETEK is considered to be a Distance-to-Fault product rather than a full-featured OTDR. In OTDRs, you pay a lot for the increased sensitivity.