A2Billing complements the Asterisk project by enabling the following features on both TDM and VoIP calls:
Traditional calling card services
Credit limit on both pre-paid and post-paid customers
Residential VoIP services
Wholesale minutes termination
... [More] calling packages
Paypal, Moneybookers and Authorize.net integration.
The project is easy to use and is frequently seen on FreePBX installations to bring accountability to small offices' phone usage.
For ITSP and traditional telco wholesale usage it has been seen to easily scale to millions of minutes per month, with 100,000s rates across many trunks. Work is in progress to further enhance A2Billing's scalability and availability. [Less]