On CallManager 3.1(x):
CCMAdmin>Application>Cisco CallManager Servicability>Tools>Admin Servicibility Tool>Preferences>Alert Notify
On CallManager 3.2(x):
CCMAdmin>Application>Cisco CallManager Servicability>Tools>Real-Time Monitoring Tool>Preferences>Alert
These are equivalent to PerfMon alerts with CallManager attributes.
Try PerfMon and Unity Reports on the Unity server.