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Troubleshooting
3
Symptom
Display is blank
Phone not
receiving a DHCP
IP Address
No name and
Extension Number
is displayed
No audio during
a call
12
Corrective Action
Confirm the phone's power source.
1. 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.
2. If you are using the power adapter:
• Ensure it is plugged in. If it still doesn't work, replace the
power adapter.
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 or refer to the
Your phone is not registered.
1. On the Extensions page of the FortiVoice interface, ensure
the MAC address is correctly entered and the Phone Type is
FON-575. Save your configuration and reboot the phone.
2. On the phone, ensure the Server is correct. To verify, see
"For use as an external
3. If your phone is configured as an external extension,
check the network connection and firewall settings at the
FortiVoice 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
FortiVoice location.
FON-575 User
extension".
Guide.
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