No its not mandatory, 100 Trying is generally sent even before the receiver starts processing the received INVITE by that time the receiver may not be ready with the to-tag, the reason is 100 Trying is just to stop further retransmissions of INVITEs and nothing to be interpreted out of it.
Madhav On Fri, Feb 29, 2008 at 12:44 PM, Sudhir Sharma <[EMAIL PROTECTED]> wrote: > > Hi, > > Can somebody please let me know if it is mandatory to add TO tag in 100 > trying message sent(initiated) by Proxy to UAC (assuming UAS does not > respond with 100 trying) > . > > Thanks in Advance > > > > > > > > > > > ____________________________________________________________________________________ > Be a better friend, newshound, and > know-it-all with Yahoo! Mobile. Try it now. > http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
