Real-time Charging System for Telecom & ISP environments

Features

• Rates for prepaid and for postpaid
• The budget expressed in money and/or minutes (seconds)
• High accuracy rating: configurable to milliseconds
• Handles volume discount
• Received calls bonus
• Fully/Easy configurable
• Very fast (5000+ req/sec on a single machine)
• Good documentation
• Commercial support available

Documentation

Step by steps tutorials

Debian apt-get repository

Browsable HTML docs http://readthedocs.org/docs/cgrates/

PDF, Epub, Manpage http://readthedocs.org/projects/cgrates/downloads/

API reference godoc

Also check irc.freenode.net #cgrates (Webchat) and Google group for a more real-time support.