# Network-provided clearing cause values

The following table lists the valid network-provided clearing cause values for ACU_CLEAR_CO, ACU_CLEAR_IN, and ACU_SUSPEND_CO messages.

These values depend upon the variant. A list of values, derived from various specifications, is defined in decisdn.h.

Network-provided clearing cause | Description
--- | ---
CAU_UNALL | Unallocated number.
CAU_NOR_STN | No route to transit network.
CAU_NOR_D | No route to destination.
CAU_CH_UNACC | Channel unacceptable.
CAU_AWARD | Call awarded and delivered in an established channel.
CAU_NORMAL_CC | Normal call clearing.
CAU_BUSY | User busy.
CAU_NO_USER_RES | No user responding.
CAU_NO_ANSW | No answer from user.
CAU_REJ | Call rejected.
CAU_NUM_CHANGED | Number changed.
CAU_NON_SEL | Non-selected user clearing.
CAU_DEST_OOF | Destination out of order.
CAU_INV | Invalid number format.
CAU_FAC_REJ | Facility rejected.
CAU_RES_TO_SE | Response to STATUS ENQUIRY.
CAU_NORMAL_UNSPEC | Normal, unspecified.
CAU_NO_CIRC_CHAN | No circuit or channel available.
CAU_NET_OOF | Network out of order.
CAU_TEMP_FAIL | Temporary failure.
CAU_CONG | Switching equipment congestion.
CAU_ACC_INF_DISC | Access information discarded.
CAU_NOT_AVAIL | Requested circuit or channel not available.
CAU_RES_UNAVAIL | Resource unavailable.
CAU_QOF_UNAVAIL | Quality of service unavailable.
CAU_FAC_NOT_SUB | Requested facility not subscribed.
CAU_BC_NOT_AUT | Bearer capability not authorized.
CAU_BC_NOT_AVAIL | Bearer capability not presently available.
CAU_SERV_NOTAVAIL | Service or option not available.
CAU_BC_NOT_IMP | Bearer capability not implemented.
CAU_CHT_NOT_IMP | Channel type not implemented.
CAU_FAC_NOT_IMP | Requested facility not implemented.
CAU_RESTR_BC | Only restricted digital bearer capability is available.
CAU_SERV_NOT_IMP | Service or option not implemented.
CAU_INV_CRV | Invalid call reference value.
CAU_CH_NOT_EX | Identified channel does not exist.
CAU_CALL_ID_NOT_EX | Call identity does not exist.
CAU_CALL_ID_IN_USE | Call identity in use.
CAU_NO_CALL_SUSP | No call suspended.
CAU_CALL_CLEARED | The call has been cleared.
CAU_INCOMP_DEST | Incompatible destination.
CAU_INV_TN | Invalid transit network selection.
CAU_INV_MSG | Invalid message.
CAU_MAND_IE_MISSING | Mandatory information element is missing.
CAU_MSGT_NOT_EX | Message type nonexistent or not implemented.
CAU_MSG_NOT_COMP | Message not compatible with call state or message type not existent.
CAU_IE_NOT_EX | Information element nonexistent or not implemented.
CAU_INV_IE_CONTENTS | Invalid information element contents.
CAU_MSG_NOT_COMP_CS | Message not compatible with call state.
CAU_RECOVERY | Recovery on timer expiration.
CAU_PROTO_ERR | Protocol error.
CAU_INTERW | Interworking.
CAU_PREEMPTION | Preemption (5ESS).
CAU_PREEMPTION_CRR | Preemption, circuit reserved for reuse (5ESS).
CAU_PREC_CALL_BLK | Precedence call blocked (5ESS).
CAU_BC_INCOMP_SERV | Bearer capability incompatible with service request (5ESS).
CAU_OUT_CALLS_BARRED | Outgoing calls barred (4ESS, 5ESS).
CAU_SERV_VIOLATED | Service operation violated (5ESS).
CAU_IN_CALLS_BARRED | Incoming calls barred (DMS, 4ESS, 5ESS).
CAU_DEST_ADD_MISSING | Destination address missing and direct call not subscribed (DMS).
CAU_RESTART | Call clearing due to restart procedure.
CAU_TIMER_300 | Call clearing due to internal timer 300 expiration.
CAU_TIMER_302 | Call clearing due to internal timer 302 expiration.
CAU_TIMER_303 | Call clearing due to internal timer 303 expiration.
CAU_TIMER_304 | Call clearing due to internal timer 304 expiration.
CAU_TIMER_308 | Call clearing due to internal timer 308 expiration.
CAU_TIMER_309 | Call clearing due to internal timer 309 expiration.
CAU_TIMER_310 | Call clearing due to internal timer 310 expiration.
CAU_TIMER_316 | Call clearing due to internal timer 316 expiration.
CAU_TIMER_317 | Call clearing due to internal timer 317 expiration.
CAU_TIMER_318 | Call clearing due to internal timer 318 expiration.
CAU_TIMER_319 | Call clearing due to internal timer 319 expiration.
CAU_TIMER_399 | Call clearing due to internal timer 399 expiration.