I use Vonage and have a HR10-250, SD-DVR40 and R15 that have no issues using Vonage to call home for Tivo updates or D* to dump the PPV info. However the H20 appears to not be able to complete a call and keeps trying to call 800-531-5602 and 866-709-2073. So far today it's tried to call out 8 times, yesterday 17 times. I know it's the H20 since if I pull the phone line out of it the calls stop. Called ID on the box works fine along with the system test, says the phone connection is OK. My take on it is the modem is too 'unforgiving' to work on Vonage. Has anyone else seeing this happening if you have an H20 and Vonage?