I am working on a system that has 2hdtivos along with 3 additional R10 tivos. All are connected to a phone line through a Panasonic phone system. All units dial 9 before dialing out. All of them are fine except for one HDtivo that completes the phone line test properly, downloads the phone numbers etc. When it attempts to download the daily call it hangs on the line for 20 minutes or more. Then shows a failed call. The guide seems to working but when you first turn it on it indicates that it has not made a successful call in100 days or something. All the units are hooked up to the same extension in parallel. As mentioned all other units are working fine. I am now trying the download on a different extension,but again it held the line for 1/2 hour and then showed "failed while preparing data". Any suggestions or is the modem hatched.