If your router next to your receiver you can put the DECA there and have them put another coax line there to plug into the DECA then take the small network patch cable plug it into the DECA back into your router. But the extra coax line will be for the DECA one end goes to the DECA from the wall jack then the other end of the new coax cable runs back to the Swim switch which then will pass your internet connection back to all of your other receivers as well. That should work as well.
Hmm don't really want three coax lines in one spot. I have another spot with a gigabit switch it can be plugged into with an unused RG6 line already there.