Troubleshooting Page 19 FortiFone User Guide
Troubleshooting
Information
Pressing the OK button on the phone provides the means to quickly view the network
parameters (IP address, default gateway address, and subnet-mask), registration status of the
phone, MAC address and firmware version. This information may be useful if calling Fortinet
Support.
Troubleshooting guide
Symptoms Corrective actions
Display is blank 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
INTERNET port on the back of your phone.
• Ensure the PoE switch is properly configured. If it still
doesn’t work, replace the Ethernet cable.
Phone not obtaining an
IP address
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. Contact your
administrator.
Phone will not register 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-375. Save your configuration and reboot
the phone.
2. On the phone, ensure the TFTP IP address is correct. To
verify, see “For use as an external extension” on page 5
3. If your phone is configured as an external extension,
check the network connection and firewall settings at the
phone system location.
No audio during a call 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.
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