[Serusers] ser + call waiting + grandstream

Hello All. Has anyone been successful getting call waiting to work with Grandstream BT100 phones? If I have a BT100 in a call and a new call comes in, I do hear the call waiting beeps. I press the "flash" button to take the new call, and this works fine. When I flash back to the original caller I get dead air. If I then flash back to the second caller I get dead air again. If I use a Cisco ATA 186 as the UAC that flashes between callers then all is fine. Buf if a grandstream is the UAC that flashes between callers, then all is not fine. Regards, Paul _______________________________ Do you Yahoo!? Declare Yourself - Register online to vote today! http://vote.yahoo.com