The IESG has received a request from the Basic Level of Interoperability for SIP Services WG (bliss) to consider the following document: - 'Shared Appearances of a Session Initiation Protocol (SIP) Address of Record (AOR)' <draft-ietf-bliss-shared-appearances-11.txt> as Proposed Standard The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to the ietf@ietf.org mailing lists by 2012-06-28. Exceptionally, comments may be sent to iesg@ietf.org instead. In either case, please retain the beginning of the Subject line to allow automated sorting. Abstract 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. The file can be obtained via http://datatracker.ietf.org/doc/draft-ietf-bliss-shared-appearances/ IESG discussion can be tracked via http://datatracker.ietf.org/doc/draft-ietf-bliss-shared-appearances/ballot/ The following IPR Declarations may be related to this I-D: http://datatracker.ietf.org/ipr/1157/ http://datatracker.ietf.org/ipr/1175/
