Voip provider

Hi all, I am new to vicidial and voip. I want to know something:
1-Can I make call without a provider on vicidial?
2-What information should I get from a provider? And how do I use it in vicidial?
Thanks for your answer.
My vicidial installation:
ViciBox_v9.x86_64-9.0.2.iso installed in vmware.
1-Can I make call without a provider on vicidial?
2-What information should I get from a provider? And how do I use it in vicidial?
Thanks for your answer.
My vicidial installation:
ViciBox_v9.x86_64-9.0.2.iso installed in vmware.