Browse Prior Art Database

PROVIDING TELEPHONY LINE IMPAIRMENT DETECTION IN THE VOICE OVER IP GATEWAY

IP.com Disclosure Number: IPCOM000032427D
Original Publication Date: 2004-Nov-04
Included in the Prior Art Database: 2004-Nov-04
Document File: 3 page(s) / 128K

Publishing Venue

Motorola

Related People

Christopher Cotignola: AUTHOR [+2]

Abstract

The current Plain Old Telephone System (P.O.T.S) network is responsible for transmitting line energy to power phones and other Customer Premise Equipment (C.P.E). The P.O.T.S network has the capability to detect line impairment and adjust its power source to prevent damage to itself and/or create a hazardous scenario for the Central Office (C.O.) or the residential user. (Line impairment could possibly be a foreign source of power that would conflict with the power source at the C.O.)

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Christopher Cotignola

Kevin Chang

PROVIDING TELEPHONY LINE IMPAIRMENT DETECTION IN THE VOICE OVER IP GATEWAY

Introduction

The current Plain Old Telephone System (P.O.T.S) network is responsible for transmitting line energy to power phones and other Customer Premise Equipment (C.P.E).  The P.O.T.S network has the capability to detect line impairment and adjust its power source to prevent damage to itself and/or create a hazardous scenario for the Central Office (C.O.) or the residential user.  (Line impairment could possibly be a foreign source of power that would conflict with the power source at the C.O.)

An expanded scenario is required in the VoIP network.  The VoIP Gateway (V.G.) is responsible to supply power to the C.P.E devices. The V.G. faces the same potential problem of line impairment as the P.O.T.S Central Office except the opportunity is expanded in the form of the P.O.T.S Central Office may now be the source of line impairment to the V.G.  (An example of potential line impairment would be:  Many customers of the VoIP service maintain the P.O.T.S service in their residence.  There is a chance that the residential lines that are powered by the P.O.T.S Central Office may get connected to the V.G.’s ports.  This would create an over-power condition and force the VoIP line out of service.)  The V.G. needs to be capable of detecting line impairment and report that discovery to the VoIP C.O.

There are 2 phases to providing Telephony Line Impairment Detection in the Voice over IP (VoIP) environment.  The first stage is the diagnostic phase.  This invention will propose conditions under which the diagnostic will execute.  The second stage is how to report the diagnostic results to the C.O.  This invention will propose methods under which the V.G. can relay the diagnostic results back to the C.O.

                    This invention will propose how to apply V.G. telephony line impairment detection in the VoIP gateway.

1.1.             The Diagnostic Phase

The diagnostic phase describes the conditions when the diagnostic executes.  The diagnostic will execute under the following conditions.

1.1.1.        External Condition

The C.O. could decide to request this diagnostic due to reports of failed service.

1.1.1.1.     SNMP

Simple Network Management Protocol –...