Maybe try this?
Adjust the number of rings before the call goes to your mailbox: Lift the receiver and press
*94 - you will hear a dial tone. Enter the number of rings you want callers to hear (must be between 2-9), listen for 2 beeps, then hang up.
For me I think I did *9435 for 35 seconds of ringing because it's different if you're on the west coast or something...
http://www2.telus.com/cgi-ebs/jsp/vi...itional=960582