Hi Users I'm Using the openser with Nat Bu using the RTP.. After invite method rtp is also established between the caller and callee ... Audio is clear.. But when I send Bye request to Callee , it not hung upping to callee it still estallishing the call... I think that .... 1) openSER server is not getting the request from callee or caller 2) OPenser is respones the BYE .. 3) Router(firewall) gateways is blocking the Bye request , to pass the request to openser, 4) Route behind the UA's isbloacking.... Here I creaking and hung upping ... Plz hep this... -- Thanks and Regards with cheers Sunkara Ravi Prakash (Voip Developer) Hyperion Technology Kondapur, Hi-tech city, Hyderabad. www.hyperion-tech.com +91-9985077535