# NCCEVN_UNBLOCK_FAILED

Request to unblock calls on a line failed.

#### State transition

None.

#### Associated function

nccUnblockCalls

#### Fields

Field | Description
ctahd | Line handle (context handle).
value | Reason for failure.

#### Reason codes

Reason code | Description
NCC_UNBLOCK_CAPABILITY_ERROR | The protocol does not support call unblocking.
NCC_UNBLOCK_OUT_OF_SEQUENCE | The line is in a state that does not allow unblocking.
NCC_UNBLOCK_TIMEOUT | Unblock command timed out.

#### Details

NCCEVN_UNBLOCK_FAILED indicates that a request to unblock calls on a line failed. The event value field contains the reason the request failed.