Troubleshooting
If you are experiencing trouble, refer to the information in this section. Before troubleshooting, confirm all
connections (see page 22) and confirm that the AC outlet or PoE device to which the unit is connected to is
receiving power.

General Use

Issue Possible Cause & Solution Reference
The display is blank. •The unit is not receiving power.
→The unit is not designed to function when there is a power
failure. Make sure that the unit is connected to the AC outlet
and receiving power. If using PoE, confirm that the device
supplying PoE is receiving power and that the LAN cable is
properly connected.
page 22
The unit is not performing
properly.
•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, wait
10 seconds, then connect the AC adaptor again. If using
PoE, disconnect the LAN cable, wait 10 seconds, then
connect the LAN cable again.
page 22

Making and Receiving Calls

Issue Possible Cause & Solution Reference
I cannot make IP calls. •The IP line is not selected.
→Before dialing, confirm that "IP" is shown in the upper-right
corner 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 other
party correctly.
page 31
•The "Operation Mode" setting is not correct.
→Change the setting to "Peer to Peer" if you want to make
or receive peer to peer IP calls (i.e., calls made by
specifying the called party's IP address).
→Change the setting to "IP-PBX" if you want to make or
receive intercom and outside calls as a SIP extension of the
connected PBX.
page 25
•Consult your system administrator. —
Document Version 2008/10 Operating Instructions 59
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Troubleshooting