The SPIRITS (Services in PSTN requesting Internet Services) Protocol
RFC 3910
Network Working Group V. Gurbani, Ed.
Request for Comments: 3910 A. Brusilovsky
Category: Standards Track I. Faynberg
Lucent Technologies, Inc.
J. Gato
Vodafone Espana
H. Lu
Bell Labs/Lucent Technologies
M. Unmehopa
Lucent Technologies, Inc.
October 2004
The SPIRITS (Services in PSTN requesting Internet Services) Protocol
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 (2004).
Abstract
This document describes the Services in PSTN (Public Switched
Telephone Network) requesting Internet Services (SPIRITS) protocol.
The purpose of the SPIRITS protocol is to support services that
originate in the cellular or wireline PSTN and necessitate
interactions between the PSTN and the Internet. On the PSTN side,
the SPIRITS services are most often initiated from the Intelligent
Network (IN) entities. Internet Call Waiting and Internet Caller-ID
Delivery are examples of SPIRITS services, as are location-based
services on the cellular network. The protocol defines the building
blocks from which many other services can be built.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Conventions used in this document. . . . . . . . . . . 3
2. Overview of operations. . . . . . . . . . . . . . . . . . . . 3
2.1. Terminology. . . . . . . . . . . . . . . . . . . . . . 6
3. Using XML for subscription and notification . . . . . . . . . 7
4. XML format definition . . . . . . . . . . . . . . . . . . . . 8
Gurbani, et al. Standards Track [Page 1]
RFC 3910 SPIRITS Protocol October 2004
5. Call-related events . . . . . . . . . . . . . . . . . . . . . 10
5.1. IN-specific requirements . . . . . . . . . . . . . . . 11
5.2. Detection points and required parameters . . . . . . . 12
5.2.1. Originating-side DPs. . . . . . . . . . . . . 12
5.2.2. Terminating-side DPs. . . . . . . . . . . . . 14
5.3. Services through dynamic DPs . . . . . . . . . . . . . 15
5.3.1. Normative usage . . . . . . . . . . . . . . . 15
5.3.2. Event package name. . . . . . . . . . . . . . 16
5.3.3. Event package parameters. . . . . . . . . . . 16
5.3.4. SUBSCRIBE bodies. . . . . . . . . . . . . . . 16
5.3.5. Subscription duration . . . . . . . . . . . . 17
5.3.6. NOTIFY bodies . . . . . . . . . . . . . . . . 17
5.3.7. Notifier processing of SUBSCRIBE requests . . 18
5.3.8. Notifier generation of NOTIFY requests. . . . 18
5.3.9. Subscriber processing of NOTIFY requests. . . 19
5.3.10. Handling of forked requests . . . . . . . . . 19
5.3.11. Rate of notifications . . . . . . . . . . . . 19
5.3.12. State Agents. . . . . . . . . . . . . . . . . 20
5.3.13. Examples. . . . . . . . . . . . . . . . . . . 20
5.3.14. Use of URIs to retrieve state . . . . . . . . 25
5.4. Services through static DPs. . . . . . . . . . . . . . 25
5.4.1. Internet Call Waiting . . . . . . . . . . . . 26
5.4.2. Call disposition choices. . . . . . . . . . . 26
5.4.3. Accepting an ICW session using VoIP . . . . . 28
6. Non-call related events . . . . . . . . . . . . . . . . . . . 29
6.1. Non-call events and their required parameters. . . . . 29
6.2. Normative usage. . . . . . . . . . . . . . . . . . . . 30
6.3. Event package name . . . . . . . . . . . . . . . . . . 30
6.4. Event package parameters . . . . . . . . . . . . . . . 31
6.5. SUBSCRIBE bodies . . . . . . . . . . . . . . . . . . . 31
6.6. Subscription duration. . . . . . . . . . . . . . . . . 31
6.7. NOTIFY bodies. . . . . . . . . . . . . . . . . . . . . 32
6.8. Notifier processing of SUBSCRIBE requests. . . . . . . 32
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