Network Working Group A. B. Roach Request for Comments: 3265 dynamicsoft Updates: 2543 June 2002 Category: Standards Track Session Initiation Protocol (SIP)-Specific Event Notification Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2002). All Rights Reserved. Abstract This document describes an extension to the Session Initiation Protocol (SIP). The purpose of this extension is to provide an extensible framework by which SIP nodes can request notification from remote nodes indicating that certain events have occurred. Concrete uses of the mechanism described in this document may be standardized in the future. Note that the event notification mechanisms defined herein are NOT intended to be a general-purpose infrastructure for all classes of event subscription and notification. Table of Contents 1. Introduction........................................... 3 1.1. Overview of Operation.................................. 4 1.2. Documentation Conventions.............................. 4 2. Definitions............................................ 5 3. Node Behavior.......................................... 6 3.1. Description of SUBSCRIBE Behavior...................... 6 3.1.1. Subscription Duration.................................. 6 3.1.2. Identification of Subscribed Events and Event Classes.. 6 3.1.3. Additional SUBSCRIBE Header Values..................... 7 3.1.4. Subscriber SUBSCRIBE Behavior.......................... 7 3.1.5. Proxy SUBSCRIBE Behavior............................... 9 3.1.6. Notifier SUBSCRIBE Behavior............................ 10 Roach Standards Track