I cant seem to identify the square boxes as highlighted in yellow in the image. I dont recognize that symbol from any electrical or CAD program. The best I can surmise is its a Microphone Jack for Audio/Video. Anyone else care to guess?
http://img407.imageshack.us/img407/1851/symbolseo3.jpg
http://img407.imageshack.us/img407/1851/symbolseo3.jpg