If you're trying to , the common code is: #333*<password># (for some networks) or ##002# (to deactivate all call barring and diversions at once).
(or Disable Call Barring )
The feature you're looking for when you enter "call barring disable" is typically called:
Leading oil companies have used our pipe systems for more than 40 years to transport oil, gas (LPG, LNG) and fuels. As a result, our pipes are used and prove their reliability every day at over 25,000 filling stations and tank facilities.