11 apr 2012 kl. 18:07 skrev Paul Kyzivat: > On 4/11/12 11:48 AM, Olle E. Johansson wrote: >> >> 11 apr 2012 kl. 17:18 skrev Paul Kyzivat: >> >>> On 4/11/12 10:37 AM, Alex Balashov wrote: >>>> 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? >>> >>> npdi is defined as a tel uri parameter, not as a sip uri parameter. It >>> makes its way into a sip uri based on the embedding of the body of a tel >>> uri into a sip uri. This results in the parameter appearing in the user >>> part of the sip uri, as in your first example. >> Does the username part actually have parameters - or does it become part of >> the username? > > Its a matter of perspective. From the perspective of sip uri syntax (from > 3261) ";npdi" is just some characters in the user part. Agree with you.
> > But when the user part is viewed as a "telephone-subscriber" from the syntax > of a tel uri it is indeed a parameter. > >> I vaguely remember a Nortel-related draft years ago about parameters in the >> username part, >> but can't find it. What's the current state? > > I don't know what you are referring to. Neither do I. Lost in memory... ;-) Thanks for the feedback, Paul! /O > > Thanks, > Paul > >>> The usage in your 2nd example is a mistake. There is no definition of >>> npdi as a sip uri parameter. But its my understanding that this is a >>> fairly common mistake - to the point that SBCs are prepared to deal with it. >>> >>> Thanks, >>> Paul >>> _______________________________________________ >>> Sip-implementors mailing list >>> [email protected] >>> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >> >> --- >> * Olle E Johansson - [email protected] >> * Cell phone +46 70 593 68 51, Office +46 8 96 40 20, Sweden >> >> >> >> --- * Olle E Johansson - [email protected] * Cell phone +46 70 593 68 51, Office +46 8 96 40 20, Sweden _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
