Prashantm at digilink.in
2009-Dec-23 05:17 UTC
[asterisk-users] Session Refresh or Codec change
Hi, How asterisk distinguish whether the re-invite is for codec change or for a session refresh? I know that it checks the session version and decides the same. But even if session version is different from the initial invite and but it has the same codec, asterisk identifies that it is a session refresh and does not pass this INVITE to the other end. Whether asterisk compares complete SDP? Is it not a burden on the system? Regards, Prashant MurthyDisclaimer : This message is proprietary to Smartlink Network Systems Limited and is intended solely for the use of the individual to whom it is addressed. It may contain privileged or confidential information and should not be circulated or used for any purpose other than for what it is intended. If you have received this message in error, please notify the originator immediately. If you are not the intended recipient, you are notified that you are strictly prohibited from using, copying, altering, or disclosing the contents of this message. Smartlink Network Systems Ltd. accepts no responsibility for loss or damage arising from the use of the information transmitted by this email including damage from virus. ______________________________________________________________________________ This email has been scrubbed for your protection by SecureMX. For more information visit http://securemx.in ______________________________________________________________________________ -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20091223/d31e44bb/attachment.htm
23 dec 2009 kl. 06.17 skrev Prashantm at digilink.in:> > Hi, > > How asterisk distinguish whether the re-invite is for codec change or for a session refresh? I know that it checks the session version and decides the same. But even if session version is different from the initial invite and but it has the same codec, asterisk identifies that it is a session refresh and does not pass this INVITE to the other end.Asterisk NEVER passes any SIP message to the other end. Asterisk is a b2bua, not a proxy. THe decision to send an re-INVITE on the second call leg is made separate from whatever happens with the SIP dialog on the first call leg. /O