Re: [BLISS] I-D Action:draft-ietf-bliss-shared-appearances-06.txt

All,

I have updated the Shared Appearances draft.  I think this version
closes all the open issues and addresses all the post WGLC comments.

At a high level, the following changes were made:

- Appearance number is now a positive integer, and added a
recommendation that the number be rendered to the user (explicitly or
implicitly)
- Added a Usage Scenario for changing UAs.
- Updated for new Alert-Info URN syntax
- Added use case for a dialog without an appearance number for calls to
fetch 'service media' such as music on hold implemented using approaches
such as [I-D.worley-service-example].
- Added handling for appearance seizure abandonment
- Discussed freeing up appearance number if an INVITE is proxied to
another AOR.
- Noted that only one appearance parameter can appear in an Alert-Info
header field.

See the diff for the full details.

Comments and feedback most welcome!

- Alan -

On 7/12/10 4:45 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)       : A. Johnston, et al.
> 	Filename        : draft-ietf-bliss-shared-appearances-06.txt
> 	Pages           : 66
> 	Date            : 2010-07-12
> 
> 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.
> 
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ietf-bliss-shared-appearances-06.txt
> 
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