ContributionsMost RecentMost LikesSolutionsRe: Calls cut off at exactly 30 minutes Same thing is happening to us. Tried reboot, still happening, every handset, every call. Disabling Voice Mail I've turned off Voice Mail in the Tools section, but when I'm on a call and another call comes in, it still gets forwarded to Voicemail. I don't want this! I don't want a caller to have a chance to leave a message if I am already on the line. My call waiting feature alerts me a call is coming in, and the incoming caller will know I'm on the other line because the phone continues to ring. That's the way I want it. Re: Calls cut off at exactly 30 minutes The same thing is happening to us on all of our phones. I tried the moderator's suggestion of rebooting the modem but it is still happening. We recently replaced a set of Panasonic phones with another new set of Panasonic phones. That seems to be when the trouble began, but I don't know if that is the cause.