Fields Common to All Call-Event Messages

The following fields are in all call-event messages:

• Connection fields that identify a call connection:

  • A numeric CallID that identifies a call.

  • A string ConnectionDeviceID that identifies each connection of a device to a call.

  • A numeric ConnectionDeviceType value that identifies the type of device to which a call is connected.

• An EventCause field that can provide a reason for the occurrence of an event. However, in most cases, no EventCause information is supplied. This is represented by the value CEC_NONE. See Call EventCause (CEC) Values, for a list of all the EventCause codes that can be reported.