Tricked Out

I just got a new Samsung a670 phone. I want to have the phone set so calls first vibrate and then ring. I have that set up. But I want to have notification of a new voicemail message either turned off or set to vibrate. Is there a way to do this (and have the vibrate/ring setting on incoming calls)? When I cannot answer the phone because of being in a meeting etc., I feel it vibrate and send it to voicemail before it rings. However, when the voicemail is received, the phone rings. I cannot find a separate setting on the phone to control the voicemail notification. I either want to turn it off or set it to a single (quiet) beep.