[Serusers] CDR Issues

[Nils Ohlmeier]

For the scenario we are talking here about, you can not guarantee 100% 
accurate accounting except you are using a B2BUA. Because if the call is on 
hold it could stay in that state forever. If the UA's do not support RTCP you 
will not see any traffic from them if they are restarted or cut off from the 
net. So IMHO the only way would be to probe the UA's regularly with SIP 
requests which check if the dialog between those two parties is still alive. 
And if you want to support all possible UA's this SIP request would have to 
be an re-INVITE. If you then get an 408 or 481 from one partie you can safely 
create the "call end" record. So at the end you need a B2BUA.

Regards
  Nils

On Thursday 30 December 2004 16:05, Adrian Georgescu wrote:
> Erik,
>
> CDRTool guarantees 100% accurate accounting for call detail records
> generated by SIP Express Router in combination  with MediaProxy
> regardless of the presence of BYE messages. This solution is available
> under commercial agreement.
>
> http://www.ag-projects.com/CDRTool.html
>
> Regards,
> Adrian
>
>
>
> OK, i've run into a problem with the CDR Creation.
>
> If you have 2 users who call each other, talk a while and then instead
> of hanging up decide to pull the plugs from their phones (or terminitate
> their application), no complete CDR is generated, the INVITE and ACK are
> logged, but since no one realy hangs up there won't be a BYE record, so
> no CDR end/total time and no billable time.
> Use the / a rtpproxy you would say, to bad it suffers from the same
> problem, if both partes put the call on hold and pull the plug the call
> keeps existing and once again an incomplete CDR.
>
> Has anyone ever suffered the same problem? And what is the most reliable
> way to generate CDRs?
>
> Kind regards,
>
> E. Versaevel
>
>
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