Visual voicemail has access to a visual interface, which shows the list of playable voicemail messages and sometimes can include decryption of those messages.
This function available in some telephone networks allows redirecting the incoming call to another telephone, for example, a mobile phone, a box of voicemail or another telephone number where the called subscriber is situated. In such a way the subscribers can, for instance, receive calls that have arrived at their work number from their home or mobile phone.