§ Troubleshooting Please check this troubleshooIng procedure before requesIng a repair. If the problem doesn’t get resolved, please contact us. PROBLEM CAUSE SOLUTION General Failure Plug and Unplug from the power source. (Do this for few Imes). Wait for at least one minute before plugging the device. If the problem is not resolved aTer doing this, please contact our customer support service. Indicate your number and broadband products. No ringer sound Ethernet cable is disconnected. Please check the connecIon of the Ethernet cable. AC adapter is disconnected. Please check the connecIon of the AC adapter. Did you change the volume Please adjust the volume on the bujon. secngs? Did you change the secngs on Revert the change secngs. Disconnect the the display? Ethernet cable (reboot). Call is interrupted Are there any abnormaliIes in Please check your network environment. by noise the network environment? Device cannot register Incorrect secngs Confirm that there is no mistake in the aTer provisioning registered MAC address, provisioning server. etc. Network issue Please check your network environment (UPnP of the router, SIP-NAT, etc.).