Hi Users , Good Morning, In local network openser is working fine...... In Behind the NAt the voice is also fine.... But problem is Not hung. upping.... I think problem in Record router header.... Actually it should reply as " Record Router < sip: public.ip:...... > " , But for me it reply as " Record Router <sip:private.ip.... > " That why i think Bye request is not reaching to openser server and its not hung upping.... and my guess is router(firewall) causing this problem , But voice is fine.... -- Thanks and Regards with cheers Sunkara Ravi Prakash (Voip Developer) Hyperion Technology www.hyperion-tech.com +91-9985077535