Because of what PEDs said, there is definitely a need for a bsf in your system. A genie isn't like other receivers. You need a bsf properly placed and not right at the hr44 either... It may eventually hurt your other receivers tuners if you don't add a bsf.
And I still don't get the Ethernet having an issue. Maybe you needed to simply reboot the router or something. DECA just doesn't wipe out home networks, its transparent to them. Or if he had hooked up a BBDECA as well as your hr44 to Ethernet that was the issue. Again, something just weird there, and I'm only curios because its just not normal, As long as your set up right, till you have issues no need to change to deca if you really don't want to. But when someone says it doesn't work and kills their home network, I just want to know why that happened for future reference, or better, what really was going on to cause any issues. You'd have to describe everything he did with deca though to really figure out where it went wrong.
I didn't see what equipment he put in. I was working in my office and noticed lost internet. Went and plugged PC directly into DSL modem and worked, so something had happened locally. He went to hr23 removed DECA and internet came back. Could have been ip conflict I guess, but since it came back with no DECA gear didn't dive into. So say I need a bsf. Where would I put it? At each of the other receivers and not at the 44?