Hi Alex, "npdi" is a parameter in Request URI. So it neither can appear in the user part nor in the domain part. It will appear as a uri-parameter as per following grammar.
Request-Line = Method SP Request-URI SP SIP-Version CRLF Request-URI = SIP-URI / SIPS-URI / absoluteURI SIP-URI = "sip:" [ userinfo ] hostport uri-parameters [ headers ] SIPS-URI = "sips:" [ userinfo ] hostport uri-parameters [ headers ] uri-parameters = *( ";" uri-parameter ) uri-parameter = transport-param / user-param / method-param / ttl-param / maddr-param / lr-param / compression-param / target-param / cause-param / orig / gr-param / other-param as per above grammar, following is valid example. sip:5551212@domain:5060;rn=...;npdi Regards, Alok Tiwari Aricent ________________________________________ From: [email protected] [[email protected]] On Behalf Of Alex Balashov [[email protected]] Sent: Wednesday, April 11, 2012 8:07 PM To: [email protected] Subject: [Sip-implementors] npdi parameter in sip: scheme URIs Between RFC 3398 and 4694, I am unclear on whether the 'npdi' parameter can only appear in the user part of a sip: RURI: sip:5551212;rn=...;npdi@domain:5060 or whether it can also appear in the domain part: sip:5551212@domain:5060;rn=...;npdi All I can find are references to the idea that these parameters appear "within" the Request URI. Are both cases valid? Thanks, -- Alex Balashov - Principal Evariste Systems LLC 235 E Ponce de Leon Ave Suite 106 Decatur, GA 30030 Tel: +1-678-954-0670 Web: http://www.evaristesys.com/, http://www.alexbalashov.com/ _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors =============================================================================== Please refer to http://www.aricent.com/legal/email_disclaimer.html for important disclosures regarding this electronic communication. =============================================================================== _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
