SO then it looks like you have a BroadBand DECA next to your HR21. Then there should be a coax going to the DECA and ethernet cable going to your router, then ANOTHER DECA connects to the HR21. So you need two DECAs. Is that what you have ?
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SO then it looks like you have a BroadBand DECA next to your HR21. Then there should be a coax going to the DECA and ethernet cable going to your router, then ANOTHER DECA connects to the HR21. So you need two DECAs. Is that what you have ?