5.8.12. Reversed Charges Calls 
For Brazil, the system uses a special line signal to signal the ANSWER
of a user who is authorized to receive calls with reversed charges to
the remote central office.
It uses the authorization to receive reversed charges calls and the
COT parameter ACRC.
- Set the COT parameter for calls to the attendant console as follows:
CHANGE-COT:COTNO=x,COTTYPE=COTADD,PAR=ACRC;
- Change the COS as follows:
CHANGE-COSSU:TYPE=COS,COS=x,AVCE=REVCHA;