[Users] Usage of record_route_preset / dispatcher / UAC-Module

[Andreas Granig]

Bogdan-Andrei Iancu wrote:
> just a short note...on the sip proxy you should do rr with the proxy's 
> IP and not with the one of the LB. Once the LB decides which proxy 
> handles the call, all sequential request must go through that proxy and 
> ideally to skip the LB.

Well, I personally prefer to do rr on the LB, because you can then 
perform a failover to another proxy on the LB if the specific proxy 
fails. Think of a scenario where LB routes the INVITE transaction to 
proxy P1 selected by Call-ID hashing, and after successful 
call-establishment P1 fails. If the BYE then hits LB, it will try to 
route it to P1 again because of the same Call-ID, and after hitting a 
timeout, a fallback to P2 can be performed. So no failover has to be 
implemented in the UACs.

For accounting purposes, the acc-records can be collected from all of 
the proxies to create the CDRs.

Just my 2 cents,
Andy