Thanks for your response Klaus. Network also does not seems to be the culprit because a normal 2-way RTP flow works fine between A and C. Will try out a few more things..... -----Original Message----- From: pjsip-bounces@xxxxxxxxxxxxxxx [mailto:pjsip-bounces at lists.pjsip.org] On Behalf Of Klaus Darilion Sent: Wednesday, March 24, 2010 3:51 AM To: pjsip list Subject: Re: Send/Receive RTP from different IP:Ports girish_kumar wrote: > Wireshark on A?s machine is not showing any RTP > packets while Wireshark on C?s machine is showing RTP sent out to > correct IP and port of A?s machine. This clearly indicates that it is not a problem with pjsip and your application, but it must be a network problem. Is there a firewall between A and C or locally (iptables ...)at A or C? > Is it fine as per RTP spec > to send to one IP:UDP port and receive from other? Yes. regards klaus _______________________________________________ Visit our blog: http://blog.pjsip.org pjsip mailing list pjsip at lists.pjsip.org http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org **************** CAUTION - Disclaimer ***************** This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Infosys has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Infosys reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Infosys e-mail system. ***INFOSYS******** End of Disclaimer ********INFOSYS***