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Appendix A - Troubleshooting
LCD Display is Blank
If the LCD display is blank, check whether the telephone has power. If you are using AC
power, the AC power adapter should be connected to the AC Adapter Port on the
telephone and plugged into an AC outlet. If that is not the problem, make sure that the AC
outlet is functional by trying another device in that outlet. If the outlet is okay, either the AC
power adapter or the telephone is defective.
If you are using power-over-Ethernet, please make sure that you are using a PowerDsine
60xx midspan power injector, and that other devices powered by the same injector work
correctly. Also try plugging in your phone into a different port on the injector. If the phone
still does not power up, please plug in a 12VDC, 500mA AC power adapter into the back
of the phone to deterkmine whether the phone is functional.
No Dial Tone
Unlike regular, analog telephones, your new telephone generates a dial tone when the
handset is taken offhook or placed into speakerphone mode even when it is not
connected to the network. Therefore, the lack of a dial tone does not necessarily mean
that the telephone is simply not connected to the network. It means that the telephone is
defective.
Cannot Place or Receive Calls
If the LCD display is functioning and you hear a dial tone but you cannot place or
receive calls, make sure that you are physically connected to the network with a
network cable connected to the network port labeled, NETWORK, on the back of your
telephone and to the network, such as a port on a hub.
If your telephone is physically connected to the network but still does not work, make
sure that the port you plug into is functional by trying another device plugged into that
same port.
If other devices operate correctly on that port, your network cable could be defective.
Try another, known-good cable.
If your telephone still does not work with a good network cable, determine whether you
can reach it using the instructions in the Installing Your Telephone on a Network
section, found elsewhere in this publication.
If your telephone is not reachable on the network, you may have accidentally disabled
DHCP but the static network address that is configured for your telephone is not
accessible on your network. You have two choices. You can either re-enable DHCP or
configure a static network address that is accessible on your network (see the
section, Configuration Menu).
If your telephone is reachable on the network but still does not work, ask your network
administrator to check for firewall-configuration problems that may be preventing you
from communicating through the firewall.
If the telephone is reachable on the network, but you are unable to place a call and are
noticing the message,
Unreachable
, repeatedly on the LCD, check your network and
server settings.
