Authors,

This is a reminder that we await word from you regarding the questions below 
and this document's readiness for publication as an RFC. The files are here:

  https://www.rfc-editor.org/authors/rfc9878.html
  https://www.rfc-editor.org/authors/rfc9878.pdf
  https://www.rfc-editor.org/authors/rfc9878.txt
  https://www.rfc-editor.org/authors/rfc9878.xml (source)

Diff files of all changes from the approved Internet-Draft:
  https://www.rfc-editor.org/authors/rfc9878-diff.html 
  https://www.rfc-editor.org/authors/rfc9878-rfcdiff.html (side by side)

This page shows the AUTH48 status of your document:
  https://www.rfc-editor.org/auth48/rfc9878

Thank you.

Alice Russo
RFC Production Center

> On Oct 10, 2025, at 6:23 PM, [email protected] wrote:
> 
> Authors,
> 
> While reviewing this document during AUTH48, please resolve (as necessary)
> the following questions, which are also in the source file.
> 
> 1) <!-- [rfced] Because this document updates RFC 7315, please
> review the errata reported for RFC 7315 
> (https://www.rfc-editor.org/errata/rfc7315)
> and let us know if you confirm our opinion that none of them
> are relevant to the content of this document.
> -->
> 
> 
> 2) <!-- [rfced] Because this document obsoletes RFC 7976, please
> review the errata reported for RFC 7976 
> (https://www.rfc-editor.org/errata/rfc7976)
> and let us know if you confirm our opinion that none of them
> are relevant to the content of this document.
> -->
> 
> 
> 3) <!-- [rfced] While we understand the original document (RFC 7976) was 
> published with the text in some of the questions below, the opportunity
> with the "bis" document is to make the text as clear as possible. 
> If you decide to make changes, you have the option to add text to 
> Section 7 to mention minor editorial updates.
> -->
> 
> 
> 4) <!--[rfced] Abstract and Introduction: Please review if the first sentence
> conveys the intended meaning. Specifically, should "currently not allowed" 
> be rephrased? This text is directly from RFC 7976, published in 2016. What 
> is the subject of "not allowed"? It can be read as the requests and responses
> are not allowed.
> 
> Based on "This specification allows some header fields to be present 
> in messages where they were previously not allowed" (Section 5), 
> we make the following suggestion. 
> 
> Original:
>   The Third Generation Partnership Project (3GPP) has identified cases
>   where different SIP private header extensions referred to as "P-"
>   header fields, and defined in RFC 7315, need to be included in SIP
>   requests and responses currently not allowed according to RFC 7315.
> 
> Perhaps:
>   The Third Generation Partnership Project (3GPP) has identified cases
>   where different SIP private header extensions referred to as "P-"
>   header fields, and defined in RFC 7315, need to be included in SIP
>   requests and responses where they were not allowed according to RFC 7315.
> -->
> 
> 
> 5) <!--[rfced] Abstract and Introduction: Please clarify "when RFC 3455 was 
> updated and subsequently obsoleted by the publication of RFC 7315". 
> In the RFC series, "updated" and "obsoleted" have distinct meanings 
> regarding the relationships between RFCs.
> 
> RFC 3455 has not been updated by any other RFCs, so the original sentence
> is not accurate. We suggest simply "obsoleted" as follows. Please let us 
> know if this is acceptable.
> 
> Original:
>   This document also makes updates for RFC 7315 in order to fix
>   misalignments that occurred when RFC 3455 was updated and
>   subsequently obsoleted by the publication of RFC 7315.
> 
> Perhaps:
>   This document also makes updates for RFC 7315 in order to fix
>   misalignments that occurred when RFC 3455 was obsoleted by 
>   RFC 7315.
> 
> Or (if you prefer to explain "obsoleted"):
>   This document also makes updates for RFC 7315 in order to fix
>   misalignments that occurred when RFC 3455 was obsoleted by
>   RFC 7315, i.e., when the content of RFC 3455 was completely replaced.
> 
> 
> FYI, similarly, we have updated Section 2.2 as follows for accuracy.
> 
> Original: when [RFC3455] was updated and obsolated by [RFC7315]
> Current:  when [RFC3455] was obsoleted by [RFC7315]
> -->
> 
> 
> 6) <!-- [rfced] Would you like the note in this document to be in an 
> <aside> element, or remain as is? It is defined as "a container for 
> content that is semantically less important or tangential to the 
> content that surrounds it" (https://authors.ietf.org/rfcxml-vocabulary#aside).
> 
> Original:
>   NOTE: In the case of the P-Called-Party-ID header field, allowing it
>   in PUBLISH requests was done deliberately in [RFC7315].  Therefore,
>   it is not considered a misalignment.
> -->
> 
> 
> 7) <!--[rfced] To prevent misreading this sentence (i.e., "the NPLI needs to 
> be stored as the location of the user"), may we add a comma as follows?
> 
> Original:
>   When an IMS session is modified, the NPLI also
>   needs to be stored as the location of the user at the time when the
>   session is modified may generate a charging event.
> 
> Suggested:
>   When an IMS session is modified, the NPLI also
>   needs to be stored, as the location of the user at the time when the
>   session is modified may generate a charging event.
> -->
> 
> 
> 8) <!--[rfced] We suggest adding articles ('the' and 'a') as follows; please 
> let
> us know if this is acceptable. (We note that RFC 7976 did not use
> articles in similar text, but 'a SIP 2xx response' appears in other RFCs.)
> 
> Original: ... within SIP 2xx response to the SIP INVITE request.
> Perhaps:  ... within the SIP 2xx response to the SIP INVITE request.
> 
> Original: Upon reception of the SDP answer within SIP 2xx response ..
> Perhaps:  Upon reception of the SDP answer within a SIP 2xx response ...
> -->
> 
> 
> 9) <!--[rfced] non-2xx response vs. SIP non-2xx response
> In other instances in this document, "SIP" does not appear before 
> "non-2xx response"; may it be removed here, or is it necessary?
> 
> Original:
>   The P-Charging-Vector header field shall not be included in SIP ACK
>   requests triggered by SIP non-2xx responses.
> 
> Perhaps (to match usage in Sections 2.3.2 and 3):
>   The P-Charging-Vector header field shall not be included in SIP ACK
>   requests triggered by non-2xx responses.
> -->
> 
> 
> 10) <!--[rfced] FYI, in Section 3, the quote of RFC 7315 ("Old text") has 
> been updated to exactly match the RFC. If you prefer to keep the blank
> lines between each sentence, then please let us know and we would suggest
> adding text to note that it does not match the original, e.g., "Blank
> lines have been added for readability."
> -->
> 
> 
> 11) <!-- [rfced] FYI, we updated the 3GPP reference titles to match 
> the titles provided by 3GPP. We have also added URLs that point to 
> the specific version used in the references. Please review.
> 
> We note the version referenced in this document is from 2016 and there have
> been several updates over the years. Would you like to update this
> reference to a more current version? Or would you like these
> references to point to the 3GPP Technical Specifications in general?
> 
> Current:
>   [TS23.228] 3GPP, "IP Multimedia Subsystem (IMS); Stage 2", Version
>              13.6.0, Release 13, 3GPP TS 23.228, June 2016,
>              <https://www.3gpp.org/ftp//Specs/
>              archive/23_series/23.228/23228-g30.zip>.
> 
>   [TS24.229] 3GPP, "IP multimedia call control protocol based on
>              Session Initiation Protocol (SIP) and Session Description
>              Protocol (SDP); Stage 3", Version 13.6.0, Release 13, 3GPP
>              TS 24.229, June 2016, <https://www.3gpp.org/ftp/Specs/
>              archive/24_series/24.229/24229-d60.zip>.
> 
> Perhaps:
>   [TS23.228]
>              3GPP, "IP Multimedia Subsystem (IMS); Stage 2", 3GPP
>              TS 23.228,
>              <https://portal.3gpp.org/desktopmodules/Specifications/
>              SpecificationDetails.aspx?specificationId=821>.
> 
>   [TS24.229]
>              3GPP, "IP multimedia call control protocol based on
>              Session Initiation Protocol (SIP) and Session Description
>              Protocol (SDP); Stage 3", 3GPP TS 24.229,
>              <https://portal.3gpp.org/desktopmodules/Specifications/
>              SpecificationDetails.aspx?specificationId=1055>.
> -->
> 
> 
> 12) <!-- [rfced] Please review the "Inclusive Language" portion of the online 
> Style Guide <https://www.rfc-editor.org/styleguide/part2/#inclusive_language>
> and let us know if any changes are needed.  Updates of this nature typically
> result in more precise language, which is helpful for readers.
> 
> Note that our script did not flag any words in particular, but this should 
> still be reviewed as a best practice.
> -->
> 
> 
> Thank you.
> 
> Alice Russo
> RFC Production Center
> 
> On Oct 10, 2025, [email protected] wrote:
> 
> *****IMPORTANT*****
> 
> Updated 2025/10/10
> 
> RFC Author(s):
> --------------
> 
> Instructions for Completing AUTH48
> 
> Your document has now entered AUTH48.  Once it has been reviewed and 
> approved by you and all coauthors, it will be published as an RFC.  
> If an author is no longer available, there are several remedies 
> available as listed in the FAQ (https://www.rfc-editor.org/faq/).
> 
> You and you coauthors are responsible for engaging other parties 
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> 
> Planning your review 
> ---------------------
> 
> Please review the following aspects of your document:
> 
> *  RFC Editor questions
> 
>  Please review and resolve any questions raised by the RFC Editor 
>  that have been included in the XML file as comments marked as 
>  follows:
> 
>  <!-- [rfced] ... -->
> 
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> 
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> 
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> 
>  Please review the full content of the document, as this cannot 
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> 
> 
> Submitting changes
> ------------------
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> 
> You may submit your changes in one of two ways:
> 
> An update to the provided XML file
> — OR —
> An explicit list of changes in this format
> 
> Section # (or indicate Global)
> 
> OLD:
> old text
> 
> NEW:
> new text
> 
> You do not need to reply with both an updated XML file and an explicit 
> list of changes, as either form is sufficient.
> 
> We will ask a stream manager to review and approve any changes that seem
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> 
> Approving for publication
> --------------------------
> 
> To approve your RFC for publication, please reply to this email stating
> that you approve this RFC for publication.  Please use ‘REPLY ALL’,
> as all the parties CCed on this message need to see your approval.
> 
> 
> Files 
> -----
> 
> The files are available here:
>  https://www.rfc-editor.org/authors/rfc9878.xml
>  https://www.rfc-editor.org/authors/rfc9878.html
>  https://www.rfc-editor.org/authors/rfc9878.pdf
>  https://www.rfc-editor.org/authors/rfc9878.txt
> 
> Diff file of the text:
>  https://www.rfc-editor.org/authors/rfc9878-diff.html
>  https://www.rfc-editor.org/authors/rfc9878-rfcdiff.html (side by side)
> 
> Diff of the XML: 
>  https://www.rfc-editor.org/authors/rfc9878-xmldiff1.html
> 
> 
> Tracking progress
> -----------------
> 
> The details of the AUTH48 status of your document are here:
>  https://www.rfc-editor.org/auth48/rfc9878
> 
> Please let us know if you have any questions.  
> 
> Thank you for your cooperation,
> 
> RFC Editor
> 
> --------------------------------------
> RFC9878 (draft-ietf-sipcore-rfc7976bis-04)
> 
> Title            : Updates to Private Header (P-Header) Extension Usage in 
> Session Initiation Protocol (SIP) Requests and Responses
> Author(s)        : C. Holmberg, N. Biondic, G. Salgueiro, R. Jesske
> WG Chair(s)      : Brian Rosen, Jean Mahoney
> Area Director(s) : Andy Newton, Orie Steele
> 

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