I am a voip engineer with more than 7yrs of expertise in the field, i have worked with a2billing, astpp billing and many more billing systems based on asterisk and freewitch, i can help you with this
Relevant Skills and Experience
i have more than 400 deployments of a2billing, very good troubleshooting skills over it, if you need to ask some other questions or relevant skills just hit me on chat or skype: montana3601
Proposed Milestones
$166 USD - system setup