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I did a search and could not find anything previously about an issue like this, so here it is... Lately we have had some phone line problems at our home. Randomly the phone would not work (people trying to call us would get a busy signal - when we picked up one of the phones, we would get nothing but dead air (no dialtone)). We had the phone company come out and check our line, all they could find was some corrosion on some of their connections, which they fixed. They told us it must be a problem in the home (most likely a short). So I went ahead and disconnected all but two phones and the 721. Still had the problem. Once I disconnected the phone line from 721, I was able to get our dialtone back. We also have DSL, and it continued to work, even when the phones did not...and yes, I have DSL blockers at each jack for the phones and 721. Now we experienced the problem again about a month later (with the 721 still disconnected from the phone line), so I got disconnected of one of the newer phones (dialtone immediately came back), so I thought maybe it wasn't the 721 causing the problem. Well, this morning before leaving for work, I reconnected the 721 to the phone line - and guess what. Not 2 hours later my wife calls me (using her cell phone) and tells me the phones are out again! Anyone else had this problem? It looks like the 721 is shorting out my phone system...

Pacman