# ACU_SS_AOC_BILLING_ID constants

These constants specify the billing ID type in the billing_id fields of the following extended data structures:

- tAcuSSAocDInform

- tAcuSSAocEInform

These constants indicate the reason why the served user is being charged:

Constant | Description/Notes
--- | ---
ACU_SS_AOC_BILLING_ID_NORMAL | Normal call setup.
ACU_SS_AOC_BILLING_ID_CREDIT_CARD | Credit card number is being charged.
ACU_SS_AOC_BILLING_ID_REVERSE | Incoming call has reversed charges.
ACU_SS_AOC_BILLING_ID_CFU | Call forwarding, unconditional, has been invoked.
ACU_SS_AOC_BILLING_ID_CFB | Call forwarding, busy, has been invoked.
ACU_SS_AOC_BILLING_ID_CFNR | Call forwarding, no response, has been invoked.
ACU_SS_AOC_BILLING_ID_CD | Call deflection has been invoked.
ACU_SS_AOC_BILLING_ID_TRF | Call transfer has been invoked.