Fortinet FortiFone FON-575 User Manual (English)

Questions and Answers:

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tosborneAug 11, 2025
Why is no name and extension number displayed on my Fortinet FortiFone FON-575 IP Phone?
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  janet58Aug 11, 2025
  The most likely cause is that your phone has not been registered. To resolve this: * Go to the Extensions page of the FortiVoice interface and confirm that the MAC address is entered correctly and the Phone Type is FON-575. * Save your configuration and then reboot the phone. * On the phone itself, ensure the Server setting is correct. If your phone is configured as an external extension, verify the network connection and firewall settings at the FortiVoice location.
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Dana WilliamsAug 18, 2025
What to do if my Fortinet IP Phone is not receiving a DHCP IP address?
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  Lorraine WhiteAug 18, 2025
  If your Fortinet IP Phone isn't getting a DHCP IP address, the DHCP server might not be responding. Ensure that your DHCP server (typically your router) is online. Try rebooting the router or DHCP server. If problems persist, the phone might need advanced network configuration; in that case, please contact your administrator.
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erik81Aug 27, 2025
How to fix no audio during a call on my Fortinet FortiFone FON-575 IP Phone?
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  wrightmichaelAug 27, 2025
  If you have no audio during a call, check the handset/headset connections. Also, ensure the phone is properly registered with the phone system. If configured as an external extension, check the network connection and firewall settings at the FortiVoice location.
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Katherine FitzgeraldSep 2, 2025
How to troubleshoot a blank display on my Fortinet FortiFone FON-575?
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  Jose BonillaSep 2, 2025
  To troubleshoot a blank display: * First, confirm the phone’s power source. * If using Power over Ethernet (PoE), ensure your Ethernet cable is plugged into the WAN port on the back of your phone and that the PoE switch is properly configured. If it still doesn’t work, replace the Ethernet cable. * If using the power adapter, ensure it is plugged in. If it still doesn’t work, replace the power adapter.