Internet Emergency Preparedness (IEPREP) Telephony Topology Terminology
RFC 3523

Document Type RFC - Informational (April 2003; No errata)
Last updated 2015-10-14
Stream IETF
Formats plain text pdf html bibtex
Stream WG state (None)
Document shepherd No shepherd assigned
IESG IESG state RFC 3523 (Informational)
Consensus Boilerplate Unknown
Telechat date
Responsible AD Allison Mankin
IESG note The name is misleading - this is a very simple topology terms document that divides the cases of Internet and PSTN meeting and bridging - RFC-Editor note with new abstract and title is due
from me
Send notices to <kimberly.s.king@saic.com>
Network Working Group                                            J. Polk
Request for Comments: 3523                                 Cisco Systems
Category: Informational                                       April 2003

               Internet Emergency Preparedness (IEPREP)
                     Telephony Topology Terminology

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 (2003).  All Rights Reserved.

Abstract

   This document defines the topology naming conventions that are to be
   used in reference to Internet Emergency Preparedness (IEPREP) phone
   calls.  These naming conventions should be used to focus the IEPREP
   Working Group during discussions and when writing requirements, gap
   analysis and other solutions documents.

Table of Contents

   1.  Introduction. . . . . . . . . . . . . . . . . . . . . . . . .  2
       1.1 Motivation. . . . . . . . . . . . . . . . . . . . . . . .  2
       1.2 Terms and Definitions . . . . . . . . . . . . . . . . . .  2
   2.  IEPREP Topologies.  . . . . . . . . . . . . . . . . . . . . .  2
       2.1 Topology "IP Bridging"  . . . . . . . . . . . . . . . . .  3
       2.2 Topology "IP at the Start". . . . . . . . . . . . . . . .  3
       2.3 Topology "IP at the End". . . . . . . . . . . . . . . . .  4
       2.4 Topology "End-to-End IP". . . . . . . . . . . . . . . . .  4
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .  5
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  5
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  5
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  5
   7.  Author's Address. . . . . . . . . . . . . . . . . . . . . . .  5
   8.  Full Copyright Statement. . . . . . . . . . . . . . . . . . .  6

Polk                         Informational                      [Page 1]
RFC 3523                        IEPREP                        April 2003

1.  Introduction

   This document defines the topology naming conventions that are to be
   used in reference to IEPREP phone calls.  These naming conventions
   should be used to focus the IEPREP Working Group (WG) during
   discussions and  when writing requirements, gap analysis and other
   solutions documents.

   There has been much confusion on the IEPREP list as well as within
   each meeting about the topologies IEPREP is considering.  Hopefully
   this document will give each reader and author a reference set of
   named architectures.

   This memo attempts to be agnostic with regard to IP signaling or
   control protocols (SIP, MEGACO, etc), as well as any underlying
   Quality of Service (QOS) mechanisms (Diffserv, RSVP, NSIS, etc).

1.1 Motivation

   Simply put, to get everyone referencing the same (named) topologies
   in order to have useful and less confusing dialog to further this
   working group's efforts.

1.2 Terms and Definitions

   The following acronyms need to be exploded for clarity:

      CSN = Circuit Switched Network

      GW  = Gateway (CSN to IP, or IP to CSN)

2.  IEPREP Topologies

   There are 4 often mentioned, but very little documented topologies
   discussed within this WG's efforts so far.  The following subsections
   name and describe each of the topologies.

   The 4 topologies are (quickly):

      Topology "IP Bridging"

      Topology "IP at the Start"

      Topology "IP at the End"

      Topology "End-to-End IP"

Polk                         Informational                      [Page 2]
RFC 3523                        IEPREP                        April 2003

2.1 Topology "IP Bridging"

   This topology is sometimes known as "IP in the Middle" of two CSNs.
   In this topology, a CSN phone of any type initiates (dials) a call to
   another CSN phone with an IP core between the two CSNs.

   This topology should simplistically look like this:

    Circuit                      Internet                    Circuit
    Switched         IP            or              IP        Switched
    Network        Ingress      IP Segment       Egress      Network
   -----------+              +--------------+              +-----------
              |    +----+    |     IP       |    +----+    |
      CSN     |    |    |    |              |    |    |    |     CSN
     Phone ------->| GW |----------------------->| GW |-------->Phone
              |    |    |    |              |    |    |    |
              |    +----+    |              |    +----+    |
   -----------+              +--------------+              +-----------

                     Figure 1. Topology "IP Bridging"

2.2 Topology "IP at the Start"

   This topology has the initiating party placing (dialing) the call
   from an IP Phone (PDA or computer), and the called party residing in
   the CSN.

        Internet                             Circuit
Show full document text