TroubleshootingIf you are experiencing trouble, refer to the information in this section. Before troubleshooting, confirm allconnections (see page 22) and confirm that the AC outlet or PoE device to which the unit is connected to isreceiving power.General UseIssue Possible Cause & Solution ReferenceThe display is blank. • The unit is not receiving power.→ The unit is not designed to function when there is a powerfailure. Make sure that the unit is connected to the AC outletand receiving power. If using PoE, confirm that the devicesupplying PoE is receiving power and that the LAN cable isproperly connected.page 22The unit is not performingproperly.• Cables or cords are not connected properly.→ Check all connections. page 22• An error has occurred.→ Reset the unit. Disconnect the unit from the AC outlet, wait10 seconds, then connect the AC adaptor again. If usingPoE, disconnect the LAN cable, wait 10 seconds, thenconnect the LAN cable again.page 22Making and Receiving CallsIssue Possible Cause & Solution ReferenceI cannot make IP calls. • The IP line is not selected.→ Before dialing, confirm that "IP" is shown in the upper-rightcorner of the display. Press the center function button([F2]) to change the line if necessary.page 30• The IP address was entered incorrectly.→ Confirm that you have entered the IP address of the otherparty correctly.page 31• The "Operation Mode" setting is not correct.→ Change the setting to "Peer to Peer" if you want to makeor receive peer to peer IP calls (i.e., calls made byspecifying the called party's IP address).→ Change the setting to "IP-PBX" if you want to make orreceive intercom and outside calls as a SIP extension of theconnected PBX.page 25• Consult your system administrator. —Document Version 2008/10 Operating Instructions 59TroubleshootingTroubleshooting