Re: [BLISS] I-D Action: draft-ietf-bliss-shared-appearances-11.txt

Alan Johnston <alan.b.johnston@gmail.com> Fri, 08 June 2012 19:35 UTC

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Date: Fri, 8 Jun 2012 14:35:33 -0500
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From: Alan Johnston <alan.b.johnston@gmail.com>
To: bliss@ietf.org
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Subject: Re: [BLISS] I-D Action: draft-ietf-bliss-shared-appearances-11.txt
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All,

This document has a number of updates based on AD review and other reviews
which are summarized below.

The changes are based on changes since the -09 version from December.

Comments are most welcome!  Thanks to everyone for their reviews and
feedback.

- Alan -

- Changed conflicting text on <exclusive> element.  True means the
call/dialog cannot be replaced or joined.  The default is False if not
specified.

- Added missing normative text on the usage of the 'shared' event parameter.

- Clarified that UAs do not insert appearance parameter into Alert-Info

- Clarified what happens if a UA in group sends an INVITE to the group AOR.
 This uses two appearance numbers.

- Removed text about proxies removing Alert-Info header fields

- Clarified that subscriptions and publications must be authorized.

- Made security considerations text consistent with that in Replaces and
Join RFCs.

- Added IANA section on registration of 'appearance' parameter to
Alert-Info header field

- Fixed error in URN registration



On Fri, Jun 8, 2012 at 1:26 PM, <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 Basic Level of
> Interoperability for SIP Services Working Group of the IETF.
>
>        Title           : Shared Appearances of a Session Initiation
> Protocol (SIP) Address of Record (AOR)
>        Author(s)       : Alan Johnston
>                          Mohsen Soroushnejad
>                          Venkatesh Venkataramanan
>        Filename        : draft-ietf-bliss-shared-appearances-11.txt
>        Pages           : 70
>        Date            : 2012-06-08
>
>   This document describes the requirements and implementation of a
>   group telephony feature commonly known as Bridged Line Appearance
>   (BLA) or Multiple Line Appearance (MLA), or Shared Call/Line
>   Appearance (SCA).  When implemented using the Session Initiation
>   Protocol (SIP), it is referred to as shared appearances of an Address
>   of Record (AOR) since SIP does not have the concept of lines.  This
>   feature is commonly offered in IP Centrex services and IP-PBX
>   offerings and is likely to be implemented on SIP IP telephones and
>   SIP feature servers used in a business environment.  This feature
>   allows several user agents (UAs) to share a common AOR, learn about
>   calls placed and received by other UAs in the group, and pick up or
>   join calls within the group.  This document discusses use cases,
>   lists requirements and defines extensions to implement this feature.
>   This specification updates RFC3261 and RFC4235.
>
>
> A URL for this Internet-Draft is:
>
> http://www.ietf.org/internet-drafts/draft-ietf-bliss-shared-appearances-11.txt
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> This Internet-Draft can be retrieved at:
>
> ftp://ftp.ietf.org/internet-drafts/draft-ietf-bliss-shared-appearances-11.txt
>
> The IETF datatracker page for this Internet-Draft is:
> https://datatracker.ietf.org/doc/draft-ietf-bliss-shared-appearances/
>
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