VIPR WG M. Barnes, Ed.
Internet-Draft Polycom
Intended status: Standards Track C. Jennings
Expires: August 29, 2013 Cisco
J. Rosenberg
jdrosen.net
M. Petit-Huguenin
Unaffiliated
February 25, 2013
Verification Involving PSTN Reachability: Requirements and Architecture
Overview
draft-jennings-vipr-overview-04
Abstract
The Session Initiation Protocol (SIP) has seen widespread deployment
within individual domains, typically supporting voice and video
communications. Though it was designed from the outset to support
inter-domain federation over the public Internet, such federation has
not materialized. The primary reasons for this are the complexities
of inter-domain phone number routing and concerns over security.
This document reviews this problem space, outlines requirements, and
then describes a new model and technique for inter-domain federation
with SIP involving the Public Switched Telephone Network (PSTN),
called Verification Involving PSTN Reachability (VIPR). VIPR
addresses the problems that have prevented inter-domain federation
over the Internet. It provides fully distributed inter-domain
routing for phone numbers, authorized mappings from phone numbers to
domains, a new technique for automated SIP anti-spam, and privacy of
number ownership, all while preserving the trapezoidal model of SIP.
Status of this Memo
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Barnes, Ed., et al. Expires August 29, 2013 [Page 1]
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This Internet-Draft will expire on August 29, 2013.
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Internet-Draft VIPR Overview February 2013
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Conventions and Terminology . . . . . . . . . . . . . . . . . 4
3. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 5
3.1. The Phone Number Routing Problem . . . . . . . . . . . . . 5
3.2. The Open Pinhole Problem . . . . . . . . . . . . . . . . . 6
3.3. Quality of Service Problem . . . . . . . . . . . . . . . . 7
3.4. Troubleshooting Problem . . . . . . . . . . . . . . . . . 7
4. Summary of Existing Solutions . . . . . . . . . . . . . . . . 8
4.1. Domain Routing . . . . . . . . . . . . . . . . . . . . . . 8
4.2. Public ENUM . . . . . . . . . . . . . . . . . . . . . . . 8
4.3. Private Federations . . . . . . . . . . . . . . . . . . . 9
5. Key Requirements . . . . . . . . . . . . . . . . . . . . . . . 10
6. Executive Overview . . . . . . . . . . . . . . . . . . . . . . 10
6.1. Key Properties . . . . . . . . . . . . . . . . . . . . . . 11
6.2. Challenging Past Assumptions . . . . . . . . . . . . . . . 12
6.3. Technical Overview . . . . . . . . . . . . . . . . . . . . 13
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