I moved into a new house, and very novice, and cant figure out all the electronics wiring that was put in when the home was built: 1. White speaker cables hanging out of ceiling. 5 cables dangling in front room for tv area (5.1 sound i guess), and 4 rooms with 2 speaker cables each. When I look at the cables in the tv area (3 speakers in front and 2 in back), i can see its a white sheath, with 4 wires inside (red, white, green, black). 2. In the unfinished basement, there are 12 cat 5e (350mhz) cables, 9 un-terminated coax cables (thats what they look like), and another 3 coax that run into a small junction, then leave as 2 on the other side. I have comcast internet and tv. I can find three jacks upstairs with tv connectors, so I am assuming the side with three cables is for those tvs, but not sure why there are 2 on the other side (I thought comcast only needs 1 cable from outside?) 3. The house is setup for home security system because I can see an ethernet and 1 black cable hanging outside above the front door (not sure what the black cable is, but guessing coax). I noticed a blank faceplate in rooms with speakers. I opened them, and saw: * Office (near front door): 2 ethernet cables and a white cable * Back door: 1 ethernet cable and 1 white cable: Outside, there are two points where white cables come out, and on the one closest to the door, there are 2 white cables together. * Kitchen: 1 ethernet cable * Bedroom: 2 ethernet, 1 white cables QUESTIONS: 1. What are all the coax cables? 2. Where do all the speaker cables end (I could climb in my attic, but need to find a ladder)? 3. How do I route the speaker cables to the receiver? 4. and why are there 4 wires in each sheath (I am only familiar with 2-wire speakers). 5. What do i need to know about the home security stuff? What controls the seakers/home security, etc..., not that I even know where the other end of these white wires are.