Asterisk A2billing setup

We require assistance to fast track our setup of a2billing and Asterisk, currently we have a2billing installed and Asterisk 1.6 however we cannot receive or make calls out to our outbound sip supplier, we need a2billing setup to be used as a voip billing system for customers with fixed did numbers rather than as a calling card system. this project is to setup a2billing and asterisk with success being the ability to make calls from a provisioned account in a2billing and successfully see the account is billing in a2, we are happy to release funds into escrow throughout the project but will not release payment until the following is completed, a2billing successfully bills accounts created with a2billing calls outbound and inbound work correctly and these are billing in a2