Voice mail is probably a feature provided by your service provider.
I have a PBX with several different viop phones configured.

The voice mail is stored on the PBX you just need to configure the message waiting light on the phone and possibly a speed button that automatically dials the voice mail code.

I assume that you don't have a PBX and an internet service provider / voice service provider has those features available for you. They should have the documentation you need to configure the phone. If they specifically support your model phone you are in luck. Otherwise you will have to adapt from their generic description.

I have noticed that some really cheap voice plans don't include voice mail.


Hope this helps.