The term 'OLD TELEPHONE FEATURE' can be broken down into two crossword solutions: DIAL (4 letters) and ROTARYDIAL (10 letters). DIAL is a term used to describe the action of pressing buttons on a telephone in order to make a call. ROTARYDIAL is an older type of telephone feature that requires the user to turn a DIAL in order to make a call. This type of telephone was popular before the invention of touch-tone phones.