单项选择题WhathappensifallCTIportsfortheconfiguredCTIPortGrouparebusywhenanewcallarrives?()
A.Caller will receive network busy treatment.
B.Caller will receive ringing treatment.
C.CallManager will forward the call to the directory number configured for forward-on busy for this CTI Route Point in CallManager.
D.An exception is raised, but the call is accepted and processed.
E.CallManager will forward the caller to the directory number configured in IPCC Express for overflow