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Subject: [cuss] I-D Action: draft-ietf-cuss-sip-uui-08.txt
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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the Call Control UUI Service for SIP Working =
Group of the IETF.

	Title           : A Mechanism for Transporting User to User Call Control I=
nformation in SIP
	Author(s)       : Alan Johnston
                          James Rafferty
	Filename        : draft-ietf-cuss-sip-uui-08.txt
	Pages           : 18
	Date            : 2012-12-01

Abstract:
   There is a class of applications which benefit from using SIP to
   exchange User to User Information (UUI) data during session
   establishment.  This information, known as call control UUI data, is
   a small piece of data inserted by an application initiating the
   session, and utilized by an application accepting the session.  The
   rules which apply for a specific application are defined by a UUI
   package.  This UUI data is opaque to SIP and its function is
   unrelated to any basic SIP function.  This document defines a new SIP
   header field, User-to-User, to transport UUI data, along with an
   extension mechanism.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-cuss-sip-uui

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-cuss-sip-uui-08

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-cuss-sip-uui-08


Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From gonzalo.camarillo@ericsson.com  Mon Dec  3 00:36:36 2012
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Date: Mon, 3 Dec 2012 10:36:33 +0200
From: Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>
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Subject: Re: [cuss] I-D Action: draft-ietf-cuss-sip-uui-08.txt
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Authors,

thanks for addressing my comments. I still have a couple of quick questions.

The new draft uses RFC Required as its IANA policy. I have not seen any
discussions on the mailing list about this. Has the WG considered the
Specification Required policy as well? Given that the draft gives
guidelines on what is appropriate to register and what is not, having a
policy that involves some type of technical review (e.g., by an expert)
would seem a natural choice. What were the reasons considered when
making this decision?

I had a comment on the first sentence of Section 4.1 that does not seem
to have been addressed. What is the meaning of "only" in this sentence?

>    The User-to-User (UUI) header field can be present in INVITE requests
>    and responses only and in BYE requests and responses.

Thanks,

Gonzalo


On 02/12/2012 1:44 AM, internet-drafts@ietf.org wrote:
> 
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
>  This draft is a work item of the Call Control UUI Service for SIP Working Group of the IETF.
> 
> 	Title           : A Mechanism for Transporting User to User Call Control Information in SIP
> 	Author(s)       : Alan Johnston
>                           James Rafferty
> 	Filename        : draft-ietf-cuss-sip-uui-08.txt
> 	Pages           : 18
> 	Date            : 2012-12-01
> 
> Abstract:
>    There is a class of applications which benefit from using SIP to
>    exchange User to User Information (UUI) data during session
>    establishment.  This information, known as call control UUI data, is
>    a small piece of data inserted by an application initiating the
>    session, and utilized by an application accepting the session.  The
>    rules which apply for a specific application are defined by a UUI
>    package.  This UUI data is opaque to SIP and its function is
>    unrelated to any basic SIP function.  This document defines a new SIP
>    header field, User-to-User, to transport UUI data, along with an
>    extension mechanism.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-cuss-sip-uui
> 
> There's also a htmlized version available at:
> http://tools.ietf.org/html/draft-ietf-cuss-sip-uui-08
> 
> A diff from the previous version is available at:
> http://www.ietf.org/rfcdiff?url2=draft-ietf-cuss-sip-uui-08
> 
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
> _______________________________________________
> cuss mailing list
> cuss@ietf.org
> https://www.ietf.org/mailman/listinfo/cuss
> 
> 


From pkyzivat@alum.mit.edu  Mon Dec  3 07:46:26 2012
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Subject: Re: [cuss] I-D Action: draft-ietf-cuss-sip-uui-08.txt
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On 12/3/12 3:36 AM, Gonzalo Camarillo wrote:
> Authors,
>
> thanks for addressing my comments. I still have a couple of quick questions.
>
> The new draft uses RFC Required as its IANA policy. I have not seen any
> discussions on the mailing list about this. Has the WG considered the
> Specification Required policy as well? Given that the draft gives
> guidelines on what is appropriate to register and what is not, having a
> policy that involves some type of technical review (e.g., by an expert)
> would seem a natural choice. What were the reasons considered when
> making this decision?

Thanks for bringing this up.

Others can report their recollection - I recall that this was discussed. 
It was (and still is) my opinion that the bar needs to be very low for 
defining these extensions, because they are likely to be custom to 
individual vendor applications or individual enterprise deployments. I'm 
not sure that even FCFS is a low enough bar. But I finally gave up 
arguing this point because most everyone seems to think that the only 
*real* usage with be with the legacy default.

IIUC, the legacy usage of this has the format of uui data being 
deployment-specific without any mechanism for verifying that sender and 
receiver agree on what that format it.

	Thanks,
	Paul

> I had a comment on the first sentence of Section 4.1 that does not seem
> to have been addressed. What is the meaning of "only" in this sentence?
>
>>     The User-to-User (UUI) header field can be present in INVITE requests
>>     and responses only and in BYE requests and responses.
>
> Thanks,
>
> Gonzalo
>
>
> On 02/12/2012 1:44 AM, internet-drafts@ietf.org wrote:
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts directories.
>>   This draft is a work item of the Call Control UUI Service for SIP Working Group of the IETF.
>>
>> 	Title           : A Mechanism for Transporting User to User Call Control Information in SIP
>> 	Author(s)       : Alan Johnston
>>                            James Rafferty
>> 	Filename        : draft-ietf-cuss-sip-uui-08.txt
>> 	Pages           : 18
>> 	Date            : 2012-12-01
>>
>> Abstract:
>>     There is a class of applications which benefit from using SIP to
>>     exchange User to User Information (UUI) data during session
>>     establishment.  This information, known as call control UUI data, is
>>     a small piece of data inserted by an application initiating the
>>     session, and utilized by an application accepting the session.  The
>>     rules which apply for a specific application are defined by a UUI
>>     package.  This UUI data is opaque to SIP and its function is
>>     unrelated to any basic SIP function.  This document defines a new SIP
>>     header field, User-to-User, to transport UUI data, along with an
>>     extension mechanism.
>>
>>
>> The IETF datatracker status page for this draft is:
>> https://datatracker.ietf.org/doc/draft-ietf-cuss-sip-uui
>>
>> There's also a htmlized version available at:
>> http://tools.ietf.org/html/draft-ietf-cuss-sip-uui-08
>>
>> A diff from the previous version is available at:
>> http://www.ietf.org/rfcdiff?url2=draft-ietf-cuss-sip-uui-08
>>
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
>> _______________________________________________
>> cuss mailing list
>> cuss@ietf.org
>> https://www.ietf.org/mailman/listinfo/cuss
>>
>>
>
> _______________________________________________
> cuss mailing list
> cuss@ietf.org
> https://www.ietf.org/mailman/listinfo/cuss
>


From James.Rafferty@dialogic.com  Fri Dec 28 07:15:08 2012
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From: James Rafferty <James.Rafferty@dialogic.com>
To: Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>, "cuss@ietf.org" <cuss@ietf.org>
Date: Fri, 28 Dec 2012 10:15:05 -0500
Thread-Topic: [cuss] I-D Action: draft-ietf-cuss-sip-uui-08.txt
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Subject: Re: [cuss] I-D Action: draft-ietf-cuss-sip-uui-08.txt
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Gonzalo,=20

Please see my comments below: =20

James
-----Original Message-----
From: cuss-bounces@ietf.org [mailto:cuss-bounces@ietf.org] On Behalf Of Gon=
zalo Camarillo
Sent: Monday, December 03, 2012 3:37 AM
To: cuss@ietf.org
Subject: Re: [cuss] I-D Action: draft-ietf-cuss-sip-uui-08.txt

Authors,

thanks for addressing my comments. I still have a couple of quick questions=
.

The new draft uses RFC Required as its IANA policy. I have not seen any dis=
cussions on the mailing list about this. Has the WG considered the Specific=
ation Required policy as well? Given that the draft gives guidelines on wha=
t is appropriate to register and what is not, having a policy that involves=
 some type of technical review (e.g., by an expert) would seem a natural ch=
oice. What were the reasons considered when making this decision?

JR - There was a brief exchange between Keith Drage and Alan Johnston on th=
is topic around Sept. 19, 2011 on the CUSS list, but I didn't see any immed=
iate further discussion.   See the emails with Subject:    Registration req=
uirements for new parameter values in the User-to-User header field.   Ther=
e were several items to be clarified at that time around what kind of conte=
nt needed to be specified for new UUI applications as a result of October l=
ist discussions and an interim meeting.   The result was additional IANA ve=
rbiage being added within the -03 version of the document in Section 6.4 - =
6.5  stating that a Standards Track RFC was required for registering new va=
lues for the content and encoding parameters of the UUI header.   =20

I had a comment on the first sentence of Section 4.1 that does not seem to =
have been addressed. What is the meaning of "only" in this sentence?

>    The User-to-User (UUI) header field can be present in INVITE requests
>    and responses only and in BYE requests and responses.

JR - The use of "only" here now looks superfluous, since the sentence goes =
on to discuss another context where the UUI header can be used; it probably=
 would be clearer if "only" is deleted.  =20

Thanks,

Gonzalo


On 02/12/2012 1:44 AM, internet-drafts@ietf.org wrote:
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts direct=
ories.
>  This draft is a work item of the Call Control UUI Service for SIP Workin=
g Group of the IETF.
>=20
> 	Title           : A Mechanism for Transporting User to User Call Control=
 Information in SIP
> 	Author(s)       : Alan Johnston
>                           James Rafferty
> 	Filename        : draft-ietf-cuss-sip-uui-08.txt
> 	Pages           : 18
> 	Date            : 2012-12-01
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> Abstract:
>    There is a class of applications which benefit from using SIP to
>    exchange User to User Information (UUI) data during session
>    establishment.  This information, known as call control UUI data, is
>    a small piece of data inserted by an application initiating the
>    session, and utilized by an application accepting the session.  The
>    rules which apply for a specific application are defined by a UUI
>    package.  This UUI data is opaque to SIP and its function is
>    unrelated to any basic SIP function.  This document defines a new SIP
>    header field, User-to-User, to transport UUI data, along with an
>    extension mechanism.
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> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-cuss-sip-uui
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> There's also a htmlized version available at:
> http://tools.ietf.org/html/draft-ietf-cuss-sip-uui-08
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> A diff from the previous version is available at:
> http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-cuss-sip-uui-08
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> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
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> _______________________________________________
> cuss mailing list
> cuss@ietf.org
> https://www.ietf.org/mailman/listinfo/cuss
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>=20

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