"DO NOT DISTURB" / ICS stay connected

[megagprime]

i use tethering alot and have searched for a resolution and even asked telus and they dont even know what day it is half the time.

so what i want and need is a way to stop calls and txtz while im on the net
i remember when phones had *80 or something for do not disturb mode. like *71 for call forwarding but calls goto voicemail and txts get held

hope im dumb and its something easy

thanks