Asterisk research

wanna know is asterisk come with billing system or any free open source billing system can work with asterisk?

eg. if I wanna know that time is the peak and age categories and what type opf people using voip call can asterisk keep track on this or work as CRM. Can create user profile or any recommend open source can work?

please advice

try a2billing

Godson Gera
Asterisk Support Services