You must log in to the Obi locally using the IP address you assigned (if static) or press ***4 on a phone attached to the Obi.
Once logged in, reboot is in the upper right hand corner, but pulling the plug is quicker.
Call History is under Status.
You should not hear noise or a static disturbance while talking. Is it all calls?
The GV log will show the time it took to send the call to Google VM, not Obi connection time.
Did you use Obi Expert online setup? If so, it may be best to delete your settings, and re-enter them.
When you are on a call, Call Waiting should send a beep. Verify that it is turned on.
Do Not make changes from local IP access to the Obi as the Obi Expert dashboard will over-write them.