FRITZ!Box 5490 Service - Knowledge Base
"Fon" LED flashes
The "Fon" LED flashes at constant intervals.
LED indicates new messages in your mailbox
The flashing LED indicates that you have new messages in the mailbox provided by your internet telephony provider. They can be new voice messages, faxes or e-mails, for example.
Note:Since the mailbox is a service provided by your internet telephony provider, refer to your provider for further information.