[BLISS] I-D Action: draft-ietf-bliss-shared-appearances-09.txt
internet-drafts@ietf.org Fri, 30 December 2011 04:02 UTC
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Subject: [BLISS] I-D Action: draft-ietf-bliss-shared-appearances-09.txt
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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-09.txt Pages : 70 Date : 2011-12-29 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-09.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-09.txt
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