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-07.txt
Pages : 67
Date : 2011-03-14
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.
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