18.14. NCHD - No charge data during call 
Feature:
Advice of Charge Supplementary Services (AOC)
Function:
The service element AOC deals with non-service-dependent payment information. The
COT
parameter NCHD can be used to control the forwarding of such information (AOC
operations).
NCHD set: The partner system receives no call data information during the call. The
call data information is forwarded at the end of the connection with AOC-E.
NCHD not set: All AOC operations are forwarded to the partner system.
Device types:
Digital CO trunk circuits, interface circuits and tie trunk circuits
Protocol variants:
For example, ECMAV2 (CorNet-NQ Issue 2.1 Dec.96 Basic ETSI), PSS1V2 (CorNet-NQ Issue
2.1
Dec.96 Basic ISO/IEC), Euro-ISDN