Automated dialer for outbound calls to multiple customers simultaneously

Hi,

I need to develop an automated dialer or call center application which should have the following features.

1. To take phone numbers from the excel/CSV/DataBase and start dialling the different customers simultaneously (multithreading technology).

2. Manage busy,not reachable,no answer,disconnected line etc. internally at the software level and Once got connected to customer then transfer
that call to one of the caller(agent) who is free.

3. Pop up the CRM at agent.


Is there any API is available for .net which can help me to develop this product as per the scenario given above?

Thanks & Regards,
Gopi Krishna T