The version of A2Billing installed on the Sysadminman VPS template has been upgraded to version 1.4.1. It also has Asterisk 1.6 and FreePBX 2.5 installed.
Click here for more details
A2Billing 1.4 includes new features such as –
* Agent/Reseller module
* Redesigned web GUI
* New ticket system
* All configuration settings moved to database
and here are some screen shots of A2Billing 1.4 –