This object specifies the action of the voice band data
signal events handling in this DS0 group.
The real-time detected voice band data events are categorized
by VoiceBandDataEventType defined in
CISCO-VOICEBAND-DATA-PROFILE-MIB.
The value of this object is cvbdpEventMappingIndex in
cvbdpEventMappingTable.
The event handling action is specified by the entry
of cvbdpEventMappingTable indexed by the combination
of the value of ccasIfExtVoiceCfgGatewayIndex,
the value of this object and real-time voice band
data event specified by VoiceBandDataEventType.