Hello I want to test a scenario with SER and Vovida B2BUA, but I'm having some problems. If someone has tested this before, I would like to ask you the config files to help me. I'm having problems when Vovida b2bua sends second INVITE to SER and SER doesn't find UA2 (which is correctly registered) (step 3). UA2 ^ | | 4 1 2 UA1 ----> SER ------> B2BUA <----- 3 Thanks for your help Curro