Change length of rings before going to message bank

Hi there,

I was wondering if anyone knows what the code is to change the ring time before going to message bank with Vodafone?  I looked on google and found;

The below is meant to show it, but the images don't seem to load which have the code;

http://support.vodafone.com.au/articles/FAQ/change-the-ring-time-before-Voicemail-answers-phone

Apart from that I can't find anywhere that has it, would really be appreciated!