Proprietary and Confidential

VoIP Technology for Emergency Services

Spring VON 2006

James RaffertySr Product Manager

jraff@cantata.com

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Agenda

Background Emergency Svcs – Pre-VoIP Issues for VoIP and Emergency Services Transition to Hybrid VoIP Model What if we did it right?

Vision for tomorrow’s Emergency Services

On the Drawing Board Resources

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Background

In the middle of the night, a crisis occurs in a family– We dial 911– We connect to an operator– Ideally, we get the emergency service we need

But, what if? – We are on a mobile phone away from home– We have a VoIP service with limited or no E911

support– We’d like to use Instant Messaging to get service

What then?

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The Story Continues…

Today’s Basic 911 service in the US– Was designed for landline use

– Can connect us to one of 6000 Public Service Access Points (PSAPs)

– In 80% of cases, CAMA tonal signaling passes your caller ID (ANI) to the PSAP for a lookup of your address in an ALI (Automatic Location Information) database

Enhanced (E911) Service– Uses SS7 to pass the calling number, which then

causes a database lookup Much less precise location information if called from a mobile phone

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Emergency Services – Fixed Line

Fire StationPSAPALI Database

Wireline Phone

Direct Link

Analog Trunk

Local Exchange

Carrier

PSTN Contingency PSTN Routing

SS7ISUP

Data Link

E911 Selective

RouterCAMA

SS7

Class 5 Switch

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Here Comes VoIP

VoIP has some of the same issues as wireless– Location may either be fixed or mobile– Early VoIP services had NO 911 connections or

limited– Recently, FCC required VoIP operators to connect

to the E911 infrastructure “as is” – Most VoIP operators of phone replacement

services such as Vonage complied– Still no way to connect via PTP services such as

Skype

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Transition to IP Emergency Services

1. Voip connections to the existing infrastructure

2. Keep the PSAPs as is, but improve the database structure (ala NENA i2)

3. Upgrade the PSAPs to accept direct VoIP connections

4. Evolution: Bring the PSAPs into the 21st century with better databases, multi-media access and the user’s choice of communication method

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Connect to Today’s System with VoIP

Fire StationPSAP

ALI Database

SIP Phone

Application Server

Emergency Services Gateway

IP

Direct LinkSIPSIP

Emergency Services Provider

SIP Phone Provider

PSTN

SS7 Trunk

Contingency PSTN Routing

SIP

IMG 1010SS7ISUP

Data Link

E911 Selective

RouterCAMA SS7

SIP

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Improve the Database

Fire StationPSAP

VoIP Positioning

ALI Database

Emerg. Routing

SIP Phone

App Server /Softswitch

Emergency Services Gateway

IP

Address Validation

Address Validation

Direct LinkSIP

SIP

SIP

Emergency Services Provider

Voice Services Provider

PSTN

SS7 Trunk

Contingency PSTN Routing

ALI /LIS

SIP

IMG 1010SS7ISUP

Get Location

Info

Data Link

E911 Selective

RouterCAMA SS7

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Add VoIP to PSAPs

Fire StationPSAP

DNS

Third Party Services

Location Info

DHCP

SIP Phone

Outbound SIP Proxy

PSAP SIP Proxy

IPSIP

PSAP URIAddress

Validation

Address Validation

Direct LinkSIP

SIPSIP

Emergency Services Provider

Voice Services Provider

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Multi-Modal IP Emergency Services

Fire StationPSAP

DNS

Third Party Services

Location Info

DHCP

PC User with IM or Video

SIP Phone

App. Server / Softswitch

PSAP SIP Proxy

IPSIP

PSAP URI

Address Validation

Address Validation

Address Validation

Direct LinkSIP

SIPSIP

Emergency Services Provider

Voice Services Provider

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On the Drawing Board

ECRIT Standards work from IETF– Assumes that PSAPs or equivalent can be reached

directly via SIP– Will provide methods for automatically extracting location

of the endpoint from the network– Will allow for regional differences– Will provide methods for routing emergency calls based

on location – Likely to use special URI address characters such as SOS– Will provide methods that support VoIP and other real time

communications Beyond the ECRIT Standards

– Will need to support backward compatibility with PSTN and PLMN phones

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Summary

Ample Opportunity to improve Emergency Services by moving to VoIP

Changes will take place in phases– Improve the Database (ala NENA i2)– VoIP connection to PSAPs– Multimodal IP connection to PSAPs

Challenge is to fund the upgrades while continuing to improve emergency service

Standards for all-IP Emergency Services under Development

Still need to support PSTN and wireless phones

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Resources

NENA Web site: – www.nena.org– i2 specification– Various other E911 emergency specifications

IETF ECRIT Working Group– http://www.ietf.org/html.charters/ecrit-charter.html

Paper on VoIP Emergency Services Architecture and Prototype

– http://www.cs.columbia.edu/~hgs/papers/Mint0510_VoIP.pdf