Each value corresponds to an accounting facility code, of which
there are currently 10 facility codes defined with codes H.00 to
H.09, and corresponding to the above 10 facilities.
Each of the above facilities may or may not be present and stored in
the Vc for accounting purposes, depending on the nature of the call.
For example, only those Vcs where a NUI (Network User Identifier)
is used for charging or identification purposes will have a NUI
stored in the Vc.
Description of bits:
notused0(0)
notused1(1)
originalCalledAddressFax(2)