Need Call Centre Setup Support

Hi Team

Looking for to setup a call centre with small amount of calling agent (5) and it looks “asterisk” is something which can match with my requirement but not able to find some details I need to move on

I am looking for to know the hardware specification and related Cost. I will like to have own software to interact with you API as well

Any response with details on Hardware, Cost and software specification which meets my requirement is highly appreciated

Thanks