Rating 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

Install & run screencast: http://youtu.be/qTQZZpb-m7Q

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

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

API reference godoc or gowalker

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