Bogen DFT120 Digital Feedback Terminator for Phone Paging SystemsThe Bogen DFT120 Digital Feedback Terminator provides high quality recording and playback of audio pages. The DFT120 breaks the acoustical feedback loop created by the telephone handset and paging speaker. The page is first recorded and then played back as soon as the source handset has been put on hook. High capacity paging is accomplished by the DFT120s record during playback and page stacking capabilities. User selectable loop start trunk or 4 wire