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Troubleshooting
Symptom
Display is blank
Phone displays
Network
Disconnected
in upper left corner
of the screen
No Name and
Extension Number
is displayed
No audio during
a call
Troubleshooting
Corrective Action
Confirm the phone's power source.
1. If you are using the power adapter:
• Ensure it is plugged in. If it still doesn't work,
replace the power adapter.
2. If you are using Power over Ethernet (PoE):
• Ensure your Ethernet cable is plugged into the
WAN port on the back of your phone.
• Ensure the POE switch is properly configured. If it
still doesn't work, replace the Ethernet cable.
The DHCP server is not responding.
1. Ensure your DHCP server is online. This is typically
your router.
2. Reboot the router or DHCP server.
3. If you are still experiencing issues, the phone may
require advanced network configuration. Please
contact your administrator.
Your phone is not registered.
1. On the Extension page of the FortiVoice interface,
ensure the MAC address is correctly entered and the
Phone Type is FON-670i or FON-675i. Save your
configuration and reboot the phone.
2. On the phone, ensure the TFTP IP address is
correct. To verify, see
extension" on page
3. If your phone is configured as an external extension,
check the network connection and firewall settings
at the phone system location.
1. Check the handset/headset connections.
2. Make sure the phone is properly registered with the
phone system.
3. If your phone is configured as an external extension,
check the network connection and firewall settings
at the phone system location.
7
"For use as an external
4.
FortiFone™ QuickStart Guide
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