Here is the meaning described in 3GPP. There are the headers used in IMS network.
From: From is used for display purpose only. It is not used for billing or any such purpose. Also, this doesn't identify the user; it only identifies the display name that he/she wish to present to the other user. P-Preferred: When user has multiple Public identities, he could have different services for each identity. For example: A subscriber user1 has two identities, [EMAIL PROTECTED] and [EMAIL PROTECTED] He could choose any identity so that proper billing can be done. This Preferred identity is sent in the INVITE and other intial methods to the Proxy CSCF. The identities of the user will be notified at the REGISTER time in the P-Associated-URI of the 200 OK response of the REGISTER. P-Asserted: Once the P-CSCF validates the user, based on security and certificates, P-CSCF asserts the user by converting the P-Preferred to P-Asserted. Assertion signifies that the other proxy/CSCF/AS servers that the user is what he said he is. If the P-CSCF could not assert the user then S-CSCF (Serving CSCF) can authenticate the user using 407 challenge. Also P-Asserted identifies the subscriber and the services that needs to be rendered. This is never set to anonymous like From. This also gives the network to run proper services when user makes an anonymous call. The display is anonymous but the user is clearly identified using P-Asserted. Hope this clarifies. -Dutt -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, July 04, 2007 5:25 AM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: [Sip-implementors] Privacy and P-asserted Identity headers Hi Varun, To my knowledge p-asserted Identity and privacy go together p-asserted Identity is used for call ID display but based on Privacy level Present in the privacy header. Regards Sunil Verma -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of varun Sent: Wednesday, July 04, 2007 4:24 PM To: varun; [EMAIL PROTECTED] Subject: Re: [Sip-implementors] Privacy and P-asserted Identity headers Could somebody reply please~! --- varun <[EMAIL PROTECTED]> wrote: > Hi, > I tried to understand the use of privacy and > P-asserted Identity headers in SIP but not really > clear about these. > Could somebody explain in simple terms the use of > these two headers. > > Need this info ASAP, would be really helpful if > somebody could reply. > > > Regards > varun > > > > ________________________________________________________________________ ____________ > Building a website is a piece of cake. Yahoo! Small > Business gives you all the tools to get online. > http://smallbusiness.yahoo.com/webhosting > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > ________________________________________________________________________ ____________ Be a better Heartthrob. Get better relationship answers from someone who knows. Yahoo! Answers - Check it out. http://answers.yahoo.com/dir/?link=list&sid=396545433 _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
