# Facility code values

The following table lists the valid facility code values for ACU_FACILITY_RQ, ACU_FACILITY_IN, and ACU_FACILITY_RQ messages.

These values are defined in isdnacu.h.

Facility code | Description
--- | ---
ACU_FAC_CALL_FORWARDING | Premise transfer.
ACU_FAC_CALL_DEFLECTION | Terminal transfer.
ACU_FAC_CHARGING | Charging.
ACU_FAC_CHARGING_TOTAL | Charging total cost.
ACU_FAC_HOLD | Call hold.
ACU_FAC_RETRIEVE | Call retrieve.
ACU_FAC_ALTERNATE | To and from facility.
ACU_FAC_TRF | Transfer.
ACU_FAC_THREE_PARTY | Conferencing.
ACU_FAC_MALICIOUS_CALL_ID | Malicious call identification.
ACU_FAC_RECALL | Recall facility (ETSI).
ACU_FAC_TRANSPARENT | Transparent facility for CC&NS.
ACU_FAC_CALL_APPEAR | Call appearance request.
ACU_FAC_FEATURE_ACT | Feature activation request.
ACU_FAC_DROP | Drop call.
ACU_FAC_FEATURE_IND | Feature indication (NT->TE only).
ACU_FAC_PCS_USER_ONLY | Send PCS-user information only, with no other facility request. Only for VN6, within ACU_FACILITY_RQ. See PCS-user information elements for more information on this IE.