I have an spa3102 that was working fine for some time. Just today I tried to change my dial plan, and after saving the settings, it never came back up. Instead, it now blinks the following sequence - 1 long red flash, 4 medium green flashes, and repeats. It does not seem to be responding to IVR or the web interface, and the phone jack remains connected to the analog line. What could have happened, and is there anything I can do to fix this?