Got a new install yesterday. We swapped out everything, including a dead HR-21 and some older gear, and I now have one HR34, one HR24 and 3 C31's. The installer took one on the extra SAT lines and plugged it into the DECA and connected it to my router and power, that's it. Is the DECA even needed with this setup? I have a router connection at the HR34, couldn't I just plug it in for same net effect?