Required A2Billing,Asterisk,Billing freelancer for VoIP Billing System job

I'm not looking to get new software developed from scratch. I'm looking for a VoIP billing platform that can import CDR's from Asterisk and Freeswitch and generate invoices will call details. The software also needs to also have other standard billing system features such as add recurring services (ie. Managed router fee's, hardware fee's etc.). I'd be interesting in seeing demonstrations of existing software you have and I will pay for that software and I will also require the PDF generated invoices to look very professional and have them rebranded to my company branding.

Skills & Expertise Required

A2Billing Asterisk Billing