I'm currently helping my mom out in her future move to her new home (it's a tough transition, moving from the home my family lived in for 25 years). I'm trying to help out as much as possible, but have hit a little stumbling block.

She'll be moving to a very nice 5-story townhome which was only built about 5 years ago. It looks like they were a bit forward-thinking, and wired the whole building with Cat5. The only problem is that I don't know how to wire this the way I want it as I'm not familiar with this part of network wiring. I'd appreciate some help from you guys, and I'll try to give you as much info as I can, which is difficult because I've only been able to see the house twice, and only been in the "wiring closet" (utility room) once.

- there are no phone jacks in the house, just RJ45 ports
- it looks like only one jack is wired for a POTS conenction, and they just hooked up a DECT phone system to that jack to get phone service throughout the home
- everything appears to go to the basement into that closet, where the security system box is, along with the Verizon FiOS phone box (the ONT box is on the back of the home, but it looks like there's a VOIP box in this closet)
- I can't tell where the individual wires from the various jacks come out, but it doesn't appear like they are connected - does that make sense?
- I don't know the terminology, but there's a block on the wall where the used Cat5 connections come in, and it is mostly unused
- the only things that appear to be wired into this block are the cables that go to the whole-home speaker system which is using Cat5 wiring, interestingly

Does it sound like I'll be able to get all these jacks networked? There is no need for POTS, as my mom has Ooma. I just don't know where to start here. Is there something I need to do with that block? Do I need to get a patchblock? Can I just find where the wires [hopefully] come out in that basement closet, put connectors on those (I can do that much), and pop them all into a switch?

Thanks for any help you can offer.