[Serusers] CDR Issues

[Erik Versaevel]

Jiri Kuthan wrote:

>At 04:14 PM 12/30/2004, Matt Schulte wrote:
>  
>
>>>I don't like the idea of having 2 or 3 programs in my path.
>>>      
>>>
>>Neither do I :-) Asterisk is a stateful *ahem* softswitch/proxy, that
>>always generates a BYE. It communicates directly with whatever it
>>connects to, unless you redirect of course. I wouldn't use Asterisk for
>>this purpose of course for many reasons either, I was just making a
>>point :-)
>>    
>>
>
>Which was right.
>
>A technique I favor is relying on trustable media gateway. Trustable means
>it is in your hands and you can rely on it to detect dead calls (either 
>by lack of RTCP or using session-timer) and hang up properly. 
>
>However, in production environments a CDR mediation devices ideally collects
>CDRs from the gateway -- the reasons is that the gateway knows all information
>best. All in all, it is the place which provides the service in question.
>It knows even media status and PSTN signaling status.
>
>Well -- people may wonder why I am mentioning just the case with PSTN gateway.
>What happens if there is no such and it is an IP-to-IP call? My suggestion
>
>is to forget charging and producing CDRs.
>
>-jiri
>
>  
>
My problem is that we don't control the SIP to PSTN gateway, so all our 
calls are SIP:SIP without the possibility to check the gateway, if one 
side hang up it is likely that the other side will create a BYE, however 
if both sides are disconnected, we have a problem.