Aastra Visual Voicemail

I am having an issue with visual voicemail on some 6737i aastra phones. I have it on a soft key where i can press voicemail and it will ask for the password for the extension the phone is set to. What i would like it to do is not ask for the password and just go to that person’s mailbox but use the variables so that i don’t have to configure each phone. Is there a way to do this?