Klaus, Yes, it does. Both client and openser were on same interface listening on different ports. Messages never showed up on wireshark for some reason. Openser debug and tcpdump did show them. thanks again. -Sid --- On Sat, 11/8/08, Klaus Darilion <klaus.mailinglists(a)pernau.at> wrote: From: Klaus Darilion <klaus.mailinglists(a)pernau.at> Subject: Re: [Kamailio-Users] Openser configured as outbound proxy - retransmissions issue. To: siddu999(a)yahoo.com Cc: users(a)lists.kamailio.org Date: Saturday, November 8, 2008, 3:28 AM Hi! Openser should retransmit in both cases. Are you using t_relay in both cases? To find out what is going on set debug=4 and watch the logfile. regards klaus Siddhardha Garige wrote: register to service provider through openser outbound proxy. I am experiencing issues with retransmissions. to UA and retransmits INVITE messages to proxy. After 8 retry attempts sends 408 Request time out to handset. All as expected. Trying to proxy and routes reqest to UA. No response from UA and ** Openser did not send any retransmissions of INVITE to UA**. After a while CANCLE arrived at openser and cleared transaction. retransmissions? wrong?