If the account code is pressed for charging whenever making a call, the account code changes. You can enter up to 999 account codes.
1) Select 4.Group & Table => 4.5 Account/Authorize Code => 4.5.2 Account Code from the Tree Viewer.
2) View the current account codes.
3) Enter the account code (up to 14 characters long) in the Account Code Number field.
4) Save the changes.