When have incoming calls, it will access to IVR and the system will do voice interactive processing. It can have different voice prompt according to different time bucket; it can also have different rules processing according to different external line calls in. for enterprises, it can better serve customer and business through flexible processing mechanism. Customer inquiries, service, complaints and other problems can be guided to professional staff. Of course, you can put someone`s number to blacklist to avoid some crank calls.