All, as a personal gratitude for all the efforts involved in opensource projects, especially in OpenSER community, I would like to contribute myself with a bit of code, investing in something I considered useful for this community. Hereby, I inform u that the first release of FreeRADIUS-CDRTool connector module is available for download and use at sourceforge.net. Project link: http://sourceforge.net/projects/frad-cdrtool/ Basically, FreeRADIUS-CDRTool is a FreeRADIUS module written in python (therefore one might need to compile rlm_python in FreeRADIUS to make it work), able to connect on CDRTool Engine via the Telnet socket (the only way I found recommended by CDRTool folks) and perform different actions via Prepaid API, like return maximum value for the call, instruct CDRTool to lock accounts already in a call, instruct unlocking at end of the call and balance debiting, etc. This module should be used together with OpenSER radius authentication and accounting. If proper configured, FreeRADIUS-CDRTool can authorize calls for CDRTool Prepaid users. At the starting of each call the module will return the maximum call duration allowed, information which can be processed later in a bbua scenario to timeout the calls reaching 0 balance, and total credit available at starting of the call, all through SIP-AVP Radius Attributes.