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Pre-Spirits Implementations of PSTN-initiated Services (RFC2995)

IP.com Disclosure Number: IPCOM000005189D
Original Publication Date: 2000-Nov-01
Included in the Prior Art Database: 2001-Aug-17
Document File: 45 page(s) / 97K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

H. Lu: AUTHOR [+15]

Abstract

This document contains information relevant to the work underway in The Services in the PSTN/IN Requesting InTernet Services (SPIRITS) Working Group. It describes four existing implementations of SPIRITS-like services from Korea Telecom, Lucent Technologies, NEC, and Telia in cooperation with Nortel Networks. SPIRITS-like services are those originating in the Public Switched Telephone Network (PSTN) and necessitating the interactions of the Internet and PSTN.

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Network Working Group H. Lu, Editor Request for Comments: 2995 I. Faynberg Category: Informational J. Voelker M. Weissman

W. Zhang Lucent Technologies

S. Rhim

J. Hwang Korea Telecom

S. Ago S. Moeenuddin S. Hadvani

NEC S. Nyckelgard

Telia J. Yoakum

L. Robart Nortel Networks

November 2000

Pre-SPIRITS Implementations of PSTN-initiated Services

Status of this Memo

This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2000). All Rights Reserved.

Abstract

This document contains information relevant to the work underway in The Services in the PSTN/IN Requesting InTernet Services (SPIRITS) Working Group. It describes four existing implementations of SPIRITS-like services from Korea Telecom, Lucent Technologies, NEC, and Telia in cooperation with Nortel Networks. SPIRITS-like services are those originating in the Public Switched Telephone Network (PSTN) and necessitating the interactions of the Internet and PSTN.

Lu, et al. Informational [Page 1]

RFC 2995 Pre-SPIRITS Implementations November 2000

Surveying the implementations, we can make the following observations:

o The ICW service plays the role of a benchmark service. All four implementations can support ICW, with three specifically designed for it.

o Session Initiation Protocol (SIP) is used in most of the implementations as the base communications protocol between the PSTN and Internet. (NEC's implementation is the only exception that uses a proprietary protocol. Nevertheless, NEC has a plan to support SIP together with the extensions for SPIRITS services.)

o All implementations use IN-based solutions for the PSTN part.

It is clear that not all pre-SPIRITS implementations inter-operate with each other. It is also clear that not all SIP-based implementations inter-operate with each other given that they do not support the same version of SIP. It is a task of the SPIRITS Working Group to define the inter-networking interfaces that will support interoperation of the future implementations of SPIRITS services.

Table of Contents

1. Introduction ................................................ 3 2. Service Description of Internet Call Waiting ................ 4 3. Korea Telecom's ICW Implementation .......................... 5 3.1. Overview .................................................. 5 3.2. Network Architecture ...................................... 6 3.3. Network Entities .......................................... 7 3.3.1. SSP ..................................................... 7 3.3.2. SCP ..................................................... 7 3.3.3. IP ...................................................... 7 3.3.4. ICW Server System ....................................... 7 3.3.5. ICW Client System ....................................... 8 3.3.6. Firewall ................................................ 9 3.4. Network Interfaces .........................................