> Also in-dialog OPTIONS is used to verify the state of an > existing dialog since the UAS is supposed to answer "200 OK" > in case a dialog with that "To" tag exists.
OPTIONS within a dialog is not a typical request within dialog. It cannot be used to check dialog state. RFC 5057 section 5.3 discusses the topic and quotes RFC 3261. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
