Voicemail is an automatic answering service offered by your phone service provider.
After you subscribe to this service, your phone service provider’s voice mail system answers calls for you when you are unavailable to answer the phone or when your line is busy.
Normally this notification is automatically cleared after you listen to the message.
To listen to the message, dial the Voice Mail number provided by your service provider/telephone company (for most cases, this will be your own phone number), and follow the voice instructions. Refer to the FAQ "How to use a Voicemail service with a telephone company.
If you have listened to all your voice mail messages and the handset still shows the Voicemail indicator the indicator can be manually cleared.
Video example of process to manually clear the indicator. (Process varies by model).
If the "Voicemail" message continues to appear on the screen, turn off the "Voicemail tone detection" feature.