# NMS ISDN events

The following events are specific to NMS ISDN. Examine the reason code or error code stored in the value field of the event for more information about the event or about the result of the function's execution. For more information about event handling, refer to Receiving messages from the NMS ISDN protocol stack.

Event | Hexadecimal | Decimal | Description
--- | --- | --- | ---
ISDNEVN_ERROR | 0x00072083 | 467075 | A trunk error occurred.
ISDNEVN_RCV_MESSAGE | 0x00072020 | 466976 | A message was received from an ISDN trunk.
ISDNEVN_SEND_MESSAGE | 0x00072004 | 466948 | isdnSendMessage completed. The value field of this event contains the result of the function call.
ISDNEVN_SET_MSG_CAPTURE | 0x00072082 | 467074 | isdnSetMsgCapture completed. The value field of this event contains the result of the function call.
ISDNEVN_START_PROTOCOL | 0x00072001 | 466945 | isdnStartProtocol completed. The value field of this event contains the result of the function call.
ISDNEVN_STOP_PROTOCOL | 0x00070002 | 466946 | isdnStopProtocol completed. The value field of this event contains the result of the function call.