The latest VoiceXML 2.0 and 2.1 specifications define a set of events named
connection.* and error.connection.* to report call-related
status/failures, rather than telephone.* and error.telephone.*
(which were defined in earlier versions of the VoiceXML 2.0 specification).
The IP Media Server platform supports the *connection* events,
for compliance with the naming convention used in the latest specifications.
For backward compatibility, the platform continues to support the *telephone*
events as well. Since there is no way for the platform to throw both "connection"
and "telephone" events at the same time (multiple events cannot be thrown simultaneously),
a new property - com.voicegenie.useconnectionevent - is added to
specify which naming convention the platform should use when throwing call-related
events.