I added a new receiver to my account yesterday. From about an hour after it was activated, it's been making calls every hour. (I hear the modem making some kind of odd dailing then hangup noise.) It did it all night long. I went into system test and the phone line check says 'ok' every time so I don't think the modem is broken. Each call lasts about 40 - 60 seconds. Is this kind of receiver behavior 'normal'? I've never heard my other receivers calling out once in all the years we've had Directv.