UnitBasic OperationProblem Cause and SolutionI registered a RegistrationKey, but I cannot make avideo conference call usingKX-VC Series NAT TraversalService.• The connection mode is not set to "NAT Traversal Mode".→ Set the connection mode to "NAT Traversal Mode" (Page 13).After registering aRegistration Key andrestarting the unit, theTerminal ID is not displayed inthe upper right of the Homescreen even after 5 minutes.• The LAN cable is not connected correctly.→ Check that it is connected to the unit properly.• Router settings for your Internet connection are incorrect.→ Set your router correctly, following the router’s documentation, and inaccordance with setting information supplied by your Internet provider.• Packet filtering or port forwarding is enabled on the router.→ Disable these features on the router. For details, refer to your router’sdocumentation.I extended the service period,but the Terminal ID is notdisplayed on the Homescreen.• You did not restart the unit after registering on the KX-VC Series NATTraversal Service registration page. Restarting the unit is necessary toapply the registration information.→ Turn off power to the unit, and then turn it back on to restart the unit.The service period has notbeen extended even though aservice period extension wasperformed.• You did not restart the unit after registering on the KX-VC Series NATTraversal Service registration page. Restarting the unit is necessary toapply the registration information.→ Turn off power to the unit, and then turn it back on to restart the unit.If These Messages AppearMessage Cause and SolutionFailed Registration Key codeauthentication.• You are trying to register an invalid Registration Key.→ Recheck the information of the Registration Key that was issued(Page 10), then repeat the registration (Page 15).Document Version 2012-03 NAT Traversal Service User’s Guide 35Troubleshooting