voip technology for emergency services spring von 2006
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VoIP Technology for Emergency Services Spring VON 2006. James Rafferty Sr Product Manager [email protected]. Proprietary and Confidential. Agenda. Background Emergency Svcs – Pre-VoIP Issues for VoIP and Emergency Services Transition to Hybrid VoIP Model What if we did it right? - PowerPoint PPT PresentationTRANSCRIPT
Proprietary and Confidential
VoIP Technology for Emergency Services
Spring VON 2006
James RaffertySr Product Manager
Proprietary and Confidential. Property of Cantata Technology, Inc. 2
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
Proprietary and Confidential. Property of Cantata Technology, Inc. 3
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
Proprietary and Confidential. Property of Cantata Technology, Inc. 10
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
Proprietary and Confidential. Property of Cantata Technology, Inc. 12
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