Record-Route is added to requests by proxies. However, there is nothing preventing the UAS (generating the 183/200) from adding Record-Route entries as though it has internal proxies.
Within your situation, the INVITE likely traversed proxies (although it may have hit a UAS acting as previously mentioned). > -----Original Message----- > From: [email protected] [mailto:sip- > [email protected]] On Behalf Of fuliang yuan > Sent: Wednesday, July 25, 2012 10:51 AM > To: [email protected] > Subject: [Sip-implementors] could Record-Route be added in Response? > > Hi All, > > Record route is normally added in Request. > I have encountered a weird case that INVITE from my sip device did not > have > Record-Route, but the response of 180 and 200 have Record-Route. I > could > not find if it is legit to add Record-Route in response from RFC 3261. > > > > INVITE without Record-Route ------------------> > <----------------- 183 > with > Record-Route > <----------------- 200 > with > Record-Route > > Please let me know if it is legit to add Record-Route in response? > > Thanks in advance, > > > Frank _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
