Redirect your Phone to Voicemail box - CISCO
The way you redirect your phone to your Voicemail box depends on the type of handset you use.
Redirect your CISCO Phone to your Voicemail box
If you have a CISCO handset then your phone is automatically redirected to your Voicemail box for all calls that are not answered and when you are busy on another call. This cannot be disabled from the phone.
When you have received a message, it will be either sent to MS Exchange or the red light on the top of the handset will be illuminated depending on your account configuration.
The messages or msgs button will take you direct to Voicemail.