And we could use cat5 for the phone so no big mystery there. If you wanted to run a network you have to wire it as needed. There are a lot of tutorials about proper pairs to what pins on the Ethernet jack so you couldn't be asking about that?
The home I currently live in was built in 2005. It is a two story home with approximately 12 phone jacks. I do not have any type of "smart panel", just a box on the outside of the house where all the lines (phone, tv) come into the house. I recently pulled the plates off my phone lines to determine if cat5 had been ran. What I found is confusing for me. In all the rooms there are (2) lines behind the plate. Both appear to be cat5e (as printed on the wire - TIA/EIA 568-B.2). So instead of just one blue cable housing 4 pairs I have two blue cable's housing 4 pairs each. What is connected to the phone jack is one pair from one of the housings and one pair from the other housing. The colors connected are white and white/blue.
On my first floor we have a coat closet. Inside that closet is coaxial, power and phone line. Behind this phone line plate is only one set of 4 pairs instead of 2 sets of 4 pairs like the rest of the house.
I don't understand why I have what appear to be 2 cat5 lines in all the rooms.
Any feedback is greatly appreciated.