Hi Hitesh, It appears that the far end GW detects media inactivity and drops the call. In case you know the new IP address simply send a re-INVITE with the information. This would keep the call going.
regards Rayees -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hitesh Tewari Sent: Tuesday, September 04, 2007 3:49 PM To: [email protected] Subject: [Sip-implementors] reINVITE Hi, I have a query on a very specific problem. We have a scenario where a SIP phone is located behind a NAT and wishes to communicate with a PSTN phone. We have a client on the phone that opens up the network for a specific amount of time (e.g. 3 minutes) after which the client has to re-login for an additional three minute period and so on. If a user has initiated a SIP call and a re-login occurs we are assigned new SIP and RTP ports. This has the effect of breaking the call. My question is whether there is any mechanism in SIP to convey these new settings to the PSTN gateway in order to preserve the call. I have seen messages on this forum indicating that the reINVITE message allows one to change the IP and Port numbers, but not sure if this is enough for our specific requirements. Your comments and suggestion would be highly appreciated. Thanks. Hitesh _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ ---------------------------------------------------------------------------------- IMPORTANT The information contained in this e-mail any attachments is intended only for the named recipient and may be privileged or confidential. If you are not the intended recipient, please notify us immediately on +44 (0)1908 425000 and do not disclose, copy, distribute or take any action based on the contents of this e-mail. You should understand and accept that, when communicating with us by e-mail, it is not a totally secure communication medium. We accept no liability for any direct, indirect or consequential loss arising from any action taken in reliance on the information contained in this e-mail and give no warranty or representation as to its accuracy or reliability. DIGITALK has the facility to monitor and read both incoming and outgoing communications by e-mail. In line with industry efforts to reduce the proliferation of Un-Solicited SPAM messages, DIGITALK uses various methods including Reverse-DNS lookups and ban-lists to prevent malicious content reaching our users. This message and any attachments has been scanned for known viruses. However, we would advise you to ensure the content is indeed virus free. We do not, to the extent permitted by law, accept any liability (whether in contract, negligence or otherwise) for any virus infection and/or external compromise of security and/or breach of confidentiality in relation to transmissions sent by e-mail. VAT No: GB 876 3287 81. Reg No: 3080801 Place of Registration: England Registered Office Address: 2 Radian Court, Knowlhill, Milton Keynes ----------------------------------------------------------------------------------" _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
