How to get a n70 on Optus provide data to a 770

This link showed me how...

in "Connectivity Settings"
set "Dial-up number" to "*99#"
Click on the "Advanced" then "other" tab.
entered the following as "Supplementary AT commands":
at+cgdcont=1,"IP",”internet”
(I also turned off PPP compression. not sure if that made a difference)

'internet' is the access point name used by Optus (note the lowercase i)