No, I figured that would fix the issue and support may not be able to look to see if the actual problem was not being registered, etc. On my side, the ATA still showed that it was registered and could make outbound calls. Support also got back to me via email and asked me to reboot the device so I assume they saw a registration issue. I checked again before rebooting and all incoming calls are working now so it's most likely that registration was lost somehow and the ATA re-registered on its own.