Remove local area code on outbound calls, and remove "dial 1" for long distance in Trixbox/Asterisk
Solution 1:
If you want the 933 and 1 added the you'd need "Outbound Routes" like this:
NXXXXXX
NXXNXXXXXX
Then, in your Trunks, you want this in the diaplan rules.
933+NXXXXXX
1+NXXNXXXXXX
That would accept NXXXXXX as a valid number from your handsets but would dial 933NXXXXXX when the call goes out on the trunk. The same goes for the 1. It will be added to all calls that are dialed with 10 digits.