8.1 Troubleshooting
If you still have difficulties after following the instructions in this section, disconnect the unit from the AC
outlet, then connect the AC adaptor again. If using PoE, disconnect the LAN cable, then connect the LAN
cable again.
General Use
Problem
Cause/Solution
The display is blank.
•
The unit may not be receiving power.
The unit is not designed to function when there is a power
failure. Make sure that the device supplying PoE is
receiving power and that the Ethernet cable is properly
connected. (If you are using a PoE hub, the number of
devices that you can connect simultaneously is limited by
the amount of power supplied by the hub.)
If an AC adaptor is connected, confirm that the AC
adaptor is connected and receiving power.
I cannot hear a dial tone.
•
Network settings may not be correct.
•
Many installation issues can be resolved by resetting all
the equipment. First, shut down your modem, router, hub,
unit, and PC. Then turn the devices back on, one at a
time, in this order: modem, router, hub, unit, PC.
•
If you cannot access Internet Web pages using your PC,
check to see if your phone system is having connection
issues in your area.
•
Check the VoIP status in the Web user interface and
confirm that each line is registered properly (→ see
check the setting status in the Web user interface
this section).
•
Check that the SIP server address, URLs of the
configuration files, encryption key, and other required
settings are correct.
•
Check the firewall and port forwarding settings on the
router.
•
For details about the settings, consult your network
administrator or phone system dealer.
8.1 Troubleshooting
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Administrator Guide
Document Version: 2017-07
