Red blinking lights
Here are sample paragraphs from the user manual : hope it helps !
The new message LED on the handset flashes when you have new messages in your
answering system. The LED stops flashing when all new messages are played back.
3) To delete all messages, press delete messege in standby mode. Press delete
messege again after the announcement "To delete all messages, press delete
again."
When you try to delete all messages without first listening to your new messages,
you hear several short beeps followed by an announcement "Please playback all
messages." This protects you from accidentally erasing messages you have not yet
reviewed.
Important:
When you press delete messege, you are permanently deleting the message. Once
deleted, the message cannot be replayed or retrieved.
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