I just got a new printer, an HP OfficeJet pro 6968. While I've got the wifi working just fine, my problem is using the fax capabilities. It says there is no phone line detected, I cannot send or receive. Here's the problem, plugged directly into the phone line it works just fine, when using a splitter it doesn't. Any help here? Should my splitter be plugged into my battery backup or directly into the phone jack itself on the wall? Hope that makes sense. I can't figure this out. Last printer didn't have issues.