Hi, You are not required to insert a To tag in the 100 Trying response. Personally I would probably simply discard it, if received.
Regards, Christer Holmberg Ericsson Finland "M. Ranganathan" wrote: > Dear SIP enthusiasts: > > I am puzzled by the usage of the to tag parameter in a trying. The > scenario is as follows: > > I route an invite through a proxy. > The proxy sends a trying with a to tag assigned to the trying. > The invite gets routed to the peer. > The peer responds with ringing but the tag it uses in the To header is > different than the one the proxy inserted. > > The questions I have are: > > 1. Why would the proxy insert a To tag in the trying? What is its purpose? > > 2. How is the uac that sent the invite supposed to interpret the to tag. > Can it safely igore the to tag in the trying? > > Thanks for your replies in advance. > > Regards > Ranga. > > -- > M. Ranganathan > N.I.S.T. Advanced Networking Technologies Division > 100 Bureau Drive, Stop 8920, Gaithersburg, MD 20899 > > tel:301-975-3664 fax:301-590-0932 > http://w3.antd.nist.gov/index.html mailto:[EMAIL PROTECTED] > Advanced Networking Technologies for the people! > > _______________________________________________ > Sip-implementors mailing list > [EMAIL PROTECTED] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
