IMO, "user=phone" shows user part, xxxx@, indicate TEL-URL. So, sip:[email protected];user=phone is not correct url. it should be like sip:[email protected] , or sip:312341234;phone-context=+81@@example.com etc..
user=phone points the callee is telephone-subscriber, that is, the callee is connected with the telephone network. and I think the number of callee is in E.164 address space. to conclude, sip:[email protected] indicate the user that is "+81312341234" is defined by example.com. sip:[email protected];user=phone indicate the user that is "+81312341234" is defined by telephone network. Therefore, it is thinkable that sip:[email protected] and sip:[email protected] are not equal. meanwhile, it is thinkable that sip:[email protected];user=phone and sip:[email protected];user=phone are equal, finally. I think as stated above. regards, > Hi, according to RFC 3261 BNF, URI "user" parameter can be: > > user-param = "user=" ( "phone" / "ip" / other-user) > > I know that "phone" means that the userinfo part of the URI indicates > a phone number, but what does "user=ip" mean? > > Other question: the following URI's, when in Request-Line, are > different due to "user" param: > > a) INVITE sip:[email protected] SIP/2.0 > b) INVITE sip:[email protected];user=phone SIP/2.0 > > According to table 1 in pag 150, when comparing two RequestURI's, if > one of them contains "user" param then it must be also present with > same value in the other RequestURI. Why? Why is so important "user" > param? > > IMHO it makes no sense at all. for example, some phones/PBX add the > parameter "user=phone" while other don't add it. > If in my proxy I compare the ReuqestUri by doing: > > if ( compare_ruri( request.ruri, "sip:[email protected]" ) > > then it will fail in case the request doesn't contain "user" > parameter. Why is so important this parameter? > > Thanks. ------ YOSHIKAWA Tomoyuki <[email protected]> BROADBAND SERVICE DEPARTMENT CONSUMER BUSINESS HEADQUARTERS NTT EAST TEL: +81-3-5359-9681(direct.9433) ; FAX: +81-3-5359-1291 _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
