[asterisk-biz] Billing?

[Carlos Cuervo]

Hello All!

I've been researching for the last 5 days looking for a billing  
solution to manage asterisk. I want to validate and bill calls based  
on caller IDs. The one that seems to be very popular for this is  
A2Billing and i was wondering if there is any other recommendation. It  
does not have to be open source, if its good and well supported/ 
maintained i am willing to pay.

Regards,

Carlos