rotary dial telephone rotary movement's sends electrical pulses length represents a number pulse dialing sounds like a series of clicks
{"Image DocumentName": "Rotary Dial Telephone Rotary movement\u2019s sends electrical pulses \u2013 length represents a number. Pulse dialing \u2013 sounds like a series of clicks.", "Image ImageDescription": "April 17th, 2012.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}