FRITZ!Box 6590 Cable 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 there are new messages in the mailbox made available by your internet telephony provider. These may be new voice messages, faxes or emails, for example.
Note:Since the mailbox is a service provided by your internet telephony provider, refer to your provider for further information.