E9-1-1 Call Flow Wireline/Wireless/VoIP Andy Nielsen California Emergency Communications Office 05/06/2008

May 6, 2008California Emergency Communications Office2 E9-1-1 Basics S/R PSA P Database Network CPE The three basic ingredients for E9-1-1 call processing: Network, Database, and CPE ALI DB

May 6, 2008California Emergency Communications Office3 The E9-1-1 Network S/R ALI DB PSA P End-office Switch End-office to Tandem or Selective Router Trunk group PSAP trunk group ALI Frame Relay Network

May 6, 2008California Emergency Communications Office4 Wireline Call-flow

May 6, 2008California Emergency Communications Office5 Wireline E9-1-1 Call-flow S/R ALI DB PSA P End-office Switch Caller dials “9-1-1” “9-1-1” Call is sent to S/R with ANI ANI S/R sends ANI to the ALI DB for ESN look-up ESN (which identifies the PSAP) is sent back to the S/R ESN Call and ANI are sent to PSAP ANI

May 6, 2008California Emergency Communications Office6 Wireline E9-1-1 Call-flow S/R ALI DB PSA P End-office Switch “9-1-1” ANI ESN ANI CPE at PSAP sends ANI to ALI DB for ALI look-up

May 6, 2008California Emergency Communications Office7 Wireline E9-1-1 Call-flow S/R ALI DB PSA P End-office Switch “9-1-1” ANI ESN ANI ALI is sent from the ALI DB to the PSAP ALI

May 6, 2008California Emergency Communications Office8 Wireless Call-flow

May 6, 2008California Emergency Communications Office9 Wireless E9-1-1 Call-flow S/R ALI DB PSA P End-office Switch

May 6, 2008California Emergency Communications Office10 Wireless E9-1-1 Call-flow S/R ALI DB PSA P End-office Switch

May 6, 2008California Emergency Communications Office11 Wireless E9-1-1 Call-flow S/R ALI DB PSA P Mobile Switching Center (MSC) 3 rd Party DB provider

May 6, 2008California Emergency Communications Office12 Wireless E9-1-1 Call-flow S/R ALI DB PSA P Mobile Switching Center (MSC) 3 rd Party DB provider Wireless caller dials “9-1-1”

May 6, 2008California Emergency Communications Office13 Wireless E9-1-1 Call-flow S/R ALI DB PSA P Mobile Switching Center (MSC) 3 rd Party DB provider “9-1-1” The MSC requests PSAP info from the 3 rd Party DB provider

May 6, 2008California Emergency Communications Office14 Wireless E9-1-1 Call-flow S/R ALI DB PSA P Mobile Switching Center (MSC) 3 rd Party DB provider “9-1-1” The 3 rd Party DB sends pANI (which identifies the proper PSAP) back to MSC pANI

May 6, 2008California Emergency Communications Office15 Wireless E9-1-1 Call-flow S/R ALI DB PSA P Mobile Switching Center (MSC) 3 rd Party DB provider “9-1-1” pANI The MSC sends the caller and the pANI to the S/R, where it follows the same wireline call flow

May 6, 2008California Emergency Communications Office16 Wireless E9-1-1 Call-flow S/R ALI DB PSA P Mobile Switching Center (MSC) 3 rd Party DB provider “9-1-1” pANI S/R sends pANI to the ALI DB for ESN look-up

May 6, 2008California Emergency Communications Office17 Wireless E9-1-1 Call-flow S/R ALI DB PSA P Mobile Switching Center (MSC) 3 rd Party DB provider “9-1-1” pANI ESN (which identifies the PSAP) is sent back to the S/R

May 6, 2008California Emergency Communications Office18 Wireless E9-1-1 Call-flow S/R ALI DB PSA P Mobile Switching Center (MSC) 3 rd Party DB provider “9-1-1” pANI ESN Call and pANI are sent to PSAP

May 6, 2008California Emergency Communications Office19 Wireless E9-1-1 Call-flow S/R ALI DB PSA P Mobile Switching Center (MSC) 3 rd Party DB provider “9-1-1” pANI ESN CPE at PSAP sends pANI to ALI DB for ALI look-up pANI

May 6, 2008California Emergency Communications Office20 Wireless E9-1-1 Call-flow S/R ALI DB PSA P Mobile Switching Center (MSC) 3 rd Party DB provider “9-1-1” pANI ESN pANI ALI DB determines pANI belongs to 3 rd Party DB provider and sends request over steering links to 3 rd Party DB

May 6, 2008California Emergency Communications Office21 Wireless E9-1-1 Call-flow S/R ALI DB PSA P Mobile Switching Center (MSC) 3 rd Party DB provider “9-1-1” pANI ESN pANI 3 rd Party DB looks up pANI, determines call back number, populates ALI record and sends back to ALI DB ALI record

May 6, 2008California Emergency Communications Office22 Wireless E9-1-1 Call-flow S/R ALI DB PSA P Mobile Switching Center (MSC) 3 rd Party DB provider “9-1-1” pANI ESN pANI ALI record ALI DB passes ALI record on to PSAP ALI

May 6, 2008California Emergency Communications Office23 VoIP Call-flow

May 6, 2008California Emergency Communications Office24 VoIP E9-1-1 Call-Flow S/R ALI DB PSA P Mobile Switching Center (MSC) 3 rd Party DB provider

May 6, 2008California Emergency Communications Office25 VoIP E9-1-1 Call-Flow S/R ALI DB PSA P 3 rd Party DB provider VoIP Service Provider (VSP)

May 6, 2008California Emergency Communications Office26 VoIP E9-1-1 Call-Flow S/R ALI DB PSA P 3 rd Party DB provider VoIP Service Provider (VSP) Caller dials “9-1-1” VoIP caller is sent to 3 rd Party DB provider

May 6, 2008California Emergency Communications Office27 VoIP E9-1-1 Call-Flow The 3rd Party DB determines what PSAP to send caller to, and sends pANI with call to S/R via Emergency Services Gateway S/R ALI DB PSA P 3 rd Party DB provider VoIP Service Provider (VSP) “9-1-1” Caller and pANI The VoIP call now follows the same wireline call flow

May 6, 2008California Emergency Communications Office28 VoIP E9-1-1 Call-Flow S/R ALI DB PSA P 3 rd Party DB provider VoIP Service Provider (VSP) “9-1-1” pANI S/R sends pANI to the ALI DB for ESN look-up

May 6, 2008California Emergency Communications Office29 VoIP E9-1-1 Call-Flow S/R ALI DB PSA P 3 rd Party DB provider VoIP Service Provider (VSP) “9-1-1” pANI ESN (which identifies the PSAP) is sent back to the S/R

May 6, 2008California Emergency Communications Office30 VoIP E9-1-1 Call-Flow S/R ALI DB PSA P 3 rd Party DB provider VoIP Service Provider (VSP) “9-1-1” pANI ESN Call and pANI are sent to PSAP

May 6, 2008California Emergency Communications Office31 VoIP E9-1-1 Call-Flow S/R ALI DB PSA P 3 rd Party DB provider VoIP Service Provider (VSP) “9-1-1” pANI ESN pANI CPE at PSAP sends pANI to ALI DB for ALI look-up ALI DB determines pANI belongs to 3rd Party DB provider and sends request over steering links to 3rd Party DB

May 6, 2008California Emergency Communications Office32 VoIP E9-1-1 Call-Flow S/R ALI DB PSA P 3 rd Party DB provider VoIP Service Provider (VSP) “9-1-1” pANI ESN pANI 3rd Party DB looks up pANI, determines call back number, populates ALI record and sends back to ALI DB ALI record ALI DB passes ALI record on to PSAP ALI

May 6, 2008California Emergency Communications Office33 NGEN Call-Flow Under Construction!!