[Serusers] SER RADIUS Accounting and B2BUA
Alistair Cunningham
acunningham at integrics.com
Tue Mar 8 11:45:06 CET 2005
Mohamed,
In this circumstance I would use Asterisk or a commercial soft PBX.
Alistair Cunningham,
Integrics Ltd,
Telephony, Database, Unix consulting worldwide
+44 (0)7870 699 479
http://integrics.com/
Mohamed Omar wrote:
> when using Cisco for billing and teardown, how do you over come the
> limitation of hairpinning Voip leg to Voip leg call on a cisco router if
> your are not connected to a PSTN network and you have to
> terminate on someone else gateway?
>
> Thanks
>
> Mohamed.
>
> */Alistair Cunningham <acunningham at integrics.com>/* wrote:
>
> Matt,
>
> Because SER handles SIP messages, not RTP streams, it cannot 100%
> accurately record CDRs. For instance, if the BYE message is lost
> because
> a client crashed, SER has no way of knowing when the call ended or how
> much it cost. A BTBUA gets round this problem by having the RTP packets
> come to it, so if a client crashes, the RTP stream stops and the BTBUA
> knows the call has finished. The disadvantage of a BTBUA is that it
> adds
> latency and doesn't scale well, because it needs to handle all the RTP
> traffic.
>
> I install quite a few SER and Asterisk systems for my customers, and a
> fix for this issue is the most frequent item I'm asked for. It's
> unavoidable, however, if one wants SER's scalability. What I usually
> recommend for them is to install a SER system (for scalability,
> registrations, routing of calls that don't need a CDR, etc) fronting
> multiple BTBUAs such as Asterisk or Cisco (for accurate billing of PSTN
> calls).
>
> Alistair Cunningham,
> Integrics Ltd,
> Telephony, Database, Unix consulting worldwide
> +44 (0)7870 699 479
> http://integrics.com/
>
>
> matt morris wrote:
> > Hello List,
> >
> > Just wondering, what is the radius account module for SER not
> able to
> > do, that would require the use of B2BUA in terms of having a CDR?
> > Forgive me if it is a dumb question...
> >
> > Thanks.
> >
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