After using my OBi200 for a couple of years, it has suddenly stopped making or receiving phone calls. On the device information page it shows a status of "Connect Failed: No Response". I have done the following multiple times and it doesn't help.
Delete Device
Factory Reset Device (both with ***8 & with the button on the bottom.
Deleted app permissions from my google account.
Added the device again.
Set up Google voice again.
Added the device IP address to my router's DMZ list.
Every time I try, I get the same error.
What else can I do to get it working again?