RFC 7463 · PROPOSED STANDARD · 2015 MON · 27 JUL 2026

Shared Appearances of a Session Initiation Protocol Address of Record

By A. Johnston, M. Soroushnejad, V. Venkataramanan · Published March 2015 · DOI 10.17487/RFC7463

Overview

RFC 7463, “Shared Appearances of a Session Initiation Protocol Address of Record”, is a Proposed Standard document published in March 2015 by A. Johnston, M. Soroushnejad, V. Venkataramanan. It updates RFC 3261, RFC 4235. The canonical text is published by the RFC Editor.

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 Private Branch Exchange (IPBX) 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 RFCs 3261 and 4235.

Abstract as published in the RFC, via rfc-editor.org.

What “Proposed Standard” means

An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.

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Relationships to other RFCs

This RFC updates: RFC 3261 RFC 4235

Other RFCs from 2015

Abstract

What “Proposed Standard” means

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