Best way to connect external router to OnQ

["amerdsp" <amerdsp@xxxxxxxxxxx>]

 Greetings,
  I have a house that came preinstalled with a an OnQ 1x6 Basic telecom
module (part 1267062-01)  connected to a 6 port expansion module
(1267062-01).  All the jacks throughout the house are connected to
either one.  Soon I will be getting cable internet and I would like to
connect an external router to some of the jacks in the rooms.  All
connections use standard cat5 cable from the OnQ to the jacks.  I tried
using a tone generator to isolate the unlabled cables and where they
ran, but since all the cables are connected together, it was difficult
for me to do.  Is there a simple way to do this? I am thinking, I need
to pull out the cables for the rooms that I need internet and connect
them to the router.

I am new to this but I know computers and networking pretty well.

Thank you for your time and help.

S.