Answering system
Message playback
To delete all old messages
You can only delete old (reviewed) messages. New messages must be played before you can delete them. Deleted messages cannot be retrieved again.
To delete all old messages:
1.Press 
DELETE when the telephone is in idle mode. The system will announce, "To delete all old messages, press DELETE again."
2.Press 
DELETE again. The system will announce, "All old messages deleted."
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