I'm piggybacking off of this thread as well. I've read through the two OP's questions and your responses with great interest and have learned a lot already, so I thank you for that.
Here's my situation:
1. Each room in my house has Cat5e cable run to it, and it all terminates in an OnQ box in an upstairs bedroom closet.
2. Currently, they're all terminated into a telecom module, which I already know from your explanations won't work.
3. I understand that the best thing to do would be to get a switch, toss it in the box, terminate all of the cables with RJ45 jacks, plug them into the switch, and put my cable modem and router in the box with it.
3a. The critical flaw with the plan above is that my OnQ box has no power run to it - it's in a closet in an upstairs bedroom (currently my 8-month-old's room), and the only way to get power there that I can see is to run a cord from an adjacent wall jack around the corner and into the closet. This is aesthetically displeasing and a potential safety hazard for my child as she ages, so it's not something I want to do (nor is it something I think my wife would let me do). Therefore, I have no way to power a switch, the cable modem, or router at the OnQ box.
4. Currently I have my cable modem (modem only) connected to the cable jack in my office. I have a wireless router/4-port switch unit connected to the cable modem. Connected to the switch ports I currently have my work computer and a Cisco IP Phone which connects to my office phone system (I work from home).
5. What I would like to do is set up my old wifi router/switch upstairs in my game room to act as a WAP. I would also like to plug in my PS3, Smart TV, and Airvana Airave cell tower device to the switch ports on that router/switch. I know how to set the configuration options to make it a WAP, I just need to connect it to my actual router.
So, all of that is a very long-winded way of asking this question: I realize that it's not the honest-to-goodness, "kosher" way of doing it, but if I were to identify which wires were the ones for my office and the game room, would it work for me to splice them together (perhaps by punching both into the same spot on the telecom panel), essentially creating a long network run from my office to the game room? I realize that doing so would not enable any of the other ports throughout the house, which is fine.
Thanks for the help!