Silent Detection (Kx-Fp300 Only) (Receiving Faxes From Older Model Fax Machines); Using The Unit And A Computer On The Same Line (Kx-Fp320/Kx-Fm330 Only) - Panasonic KX-FP300E Operating Instructions Manual
Plain paper facsimile & plain paper fax with answering machine & multi-function plain paper facsimile