Hi, I have record-route set from 200 OK for INVITE as Record-Route: <sip:pu3@P3.com:5060;lr> Record-Route: <sip:pu2@P2.com:5060;lr> Record-Route: <sip:pu1@P1.com:5060> Contact:<sip:u@UA.com:5060> As the last record-route header doesn't have lr param(P1 might be expecting strict routing), in this combination can I send the ACK/BYE requests to sip:u@UA.com:5060 directly? Is it possible to follow strict routing even though I get lr param? While I was interoperating with sipgate.de (SIP express router) I got ftag param and lr param in 200 OK, I was trying to send ACK/BYE requests to record-route URI instead of final destination. Iam not getting any response for BYE. Please help me. regards, SIPIT --------------------------------- Do you Yahoo!? Yahoo! Mail - now with 250MB free storage. Learn more.