In Reply to: pretty sure it is 0015 first to fax posted by kepala_udang on Thursday, 31. January 2008 at 11:30 Bali Time:
Telstra marketed 0015 when Optus came into the market inorder to ensure that whoever you chose to carry your lines, 0015 would remain a Telstra call. It is no diff to using 0011 but it would appear the marketing worked if you are still using it :).