CallistoPBX is a project mainly written in Python, based on the MIT license.
CallistoPBX - Telephony Routing and Billing Engine built on top of Asterisk and other open software
This software is being developed to replace several billing products used by Microcom Communications, Liberty Telecom, and Brute Technologies.
Replace A2Billing software currently in use for Liberty Telecom for wholesale and calling card access.
Replace custom configuration directories used for Asterisk PBX installation - CallistoPBX should help maintain and create a full fledged PBX with finer grain reporting facilities
Replace recording devices for quality assurance