Every couple of days, my Obi100 becomes unable to register; it displays "Register Failed: No Response From Server" as service status. If I reboot the device, or turn it off for a couple of minutes, it still can not register. In order to it to register again, I need either to reboot my modem/router, or turn the Obi off for several hours, or change to an alternative SIP server. Google Voice keeps working fine when this happens. Port forwarding does not correct the problem.
From what I observed, this problem happens every time my ISP changes my IP address. Does that sound reasonable? What could I do to address this problem?
Thank you.