[SR-Users] INVITE timers

Hello, I'm trying to create a scenarion which was very simple with Kamailio 1.x, but seems impossible with sr3.0. I need to do failover for INVITE's and also limit the call setup time per-branch, so I defined the problem in 2 parts that need to work separately, but also combined into 1 proxy. 1) Fast failover. After t_relay, the destination should be tried for max 2 sec per host. No maximum for the whole set. Thus, if a destination has 4 SRV records, and each host fails after 2 secs, a 408 will be sent back after a total of 8 secs. If a (proivisional) response arrives within 2 sec, a 408 MUST NOT be sent. The exact value of the timer should be configurable per t_relay call. In kamailio this is accomplished by setting the fr_timer(_avp) to 2000ms. In sr3.0 I have yet to find a combination of timer settings that work. 2) Call setup duration. If a destination host returns a response, I want to limit the attempt to 80 secs (default, should be configurable per t_relay call) of ringing/progress/whatever. After that a failure route will take care to route to a different destination, at this time this timer should be restarted. At no other time after the _first_ provisional reponse after the t_relay call should the timer be restarted. In Kamailio this was accomplished by just setting fr_inv_timer(_avp) to the desired value before t_relay(). In sr3.0 this timer will be restarted after additional provisional responses and will not be resetted after a new t_relay call (from failure_route). Any suggestions on how to get the desired behaviours are welcomed (at the moment scenario 1 is more important than 2). -- Greetings, Alex Hermann