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My calls have gone dead (unknown to me as I keep talking. Person on the other end can hear me but I don't hear them). This has been going on for about 2 months so assuming it was my 4 year old Panasonic phone, I purchased the same product to start anew.
After spending $100 on new phones, I have the same problem. I've rebooted the modem and same thing. Yesterday I "re-set" the (Panoramic) modem with a paper clip and changed the line connection in the back for Tel#1 to Tel#2. I will be happy to report back if corrected the annoying problem.
New report: I just tested it out. I called my cell phone (left it in a room with music so I could monitor) with the phone connected to my Panoramic modem that has the dropping issue and let it run out for an hour and 15 minutes and---no dropping. It was either the reset - not just reboot of modem. Either that or because I changed the tel line in the back from 1 to 2. It's easy enough to try either one or both. Good luck!