Hi, I am trying to figure out how to interpret response code 408 in a failure_route block. It seem that there is a couple of different cases. If the code means that a PSTN gateway is not responding (the tm's fr_timer has expired), I want to try another PSTN gateway. On the other hand, if the code means that the user is not responding (the tm's fr_inv_timer has expired), I want to stop trying and forward the code to the UAC. How can I tell what response code 408 actually means? Thanks! Dmitry