Hi Gauri, The example you provided for Accept-Language violates the ABNF grammar for given in RFC 3261. However if the endpoint does not interpret headers it may just silently ignore.
Accept-Language = "Accept-Language" HCOLON [ language *(COMMA language) ] language = language-range *(SEMI accept-param) language-range = ( ( 1*8ALPHA *( "-" 1*8ALPHA ) ) / "*" ) Thanks, Neel. -----Original Message----- From: sip-implementors-boun...@lists.cs.columbia.edu [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of Gauri Kshirsagar Sent: Sunday, November 29, 2015 11:40 PM To: sip-implementors@lists.cs.columbia.edu Subject: [Sip-implementors] Accept Language Header syntax Hi, Is the following format of Accept-Language header allowed ? Accept-Language: en_US Thanks, Gauri _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors