1. What’s Going on Behind Wireless Public Safety Solutions WELCOME!

2. What’s Going on Behind Wireless This presentation contains: Frequently used terms that are components of Wireless 911 Wireless Call Flow Process Questions Public Safety Solutions

3. What’s Going on Behind Wireless Frequently Used Terms HCAS – Hybrid Call-Path Associated Signaling NCAS – Non Call-Path Associated Signaling Public Safety Solutions Two Different Technologies:

4. What’s Going on Behind Wireless Frequently Used Terms MDN – Mobile Directory Number. “Callback” number of Cell Phone. pANI – pseudo ANI. Sometimes Referred to as a “routing number” A number used in wireless 911 call setup that can be used to complete routing to a specific PSAP. Two Kinds: ESRK – Emergency Services Routing Key. ESRD – Emergency Services Routing Digit. Public Safety Solutions

5. What’s Going on Behind Wireless Frequently Used Terms MSC – Mobile Switching Center. Wireless Carrier’s switch that provides connectivity between mobile users on a wireless network, with the Public Switch Telephone Network (PSTN) One switch usually covers multiple geographic areas. Public Safety Solutions

6. What’s Going on Behind Wireless Frequently Used Terms S/R – Selective Router. Also sometimes referred to as a “911 Tandem” The switch that routes the 911 call to the appropriate PSAP based on the Emergency Service Number (ESN) ESN – Emergency Service Number. A three or four digit number that allows the S/R to route a phone call to the appropriate PSAP. Public Safety Solutions

7. What’s Going on Behind Wireless Frequently Used Terms MF – Multi-Frequency Trunks. A signaling code for communication from S/R to PSAP using 8 digit ANI. EMF – Enhanced Multi-Frequency Trunks. A signaling code for communication from S/R to PSAP using 10 or 20 digit ANI. SS7 – Signaling System 7. Type of signaling code used to communicate from MSC to S/R. Public Safety Solutions

8. What’s Going on Behind Wireless Frequently Used Terms 3PDB – Third Party Database Provider. A third party company that provides ALI information. When the initial “dip” is sent from the PSAP to the SBC/ALISA database, that dip is then steered to the correct 3PDB which will return the actual ALI record. Public Safety Solutions

9. What’s Going on Behind Wireless Phase 0 (ZERO) Public Safety Solutions

10. What’s Going on Behind Wireless Phase 0 (Zero) Equivalent to Wireline Basic 9-1-1. FCC minimum requirement of all wireless carriers. Provides voice only to designated PSAP. Usually routed via a 10-digit administrative line at the PSAP. Public Safety Solutions

11. What’s Going on Behind Wireless Public Safety Solutions

12. What’s Going on Behind Wireless Public Safety Solutions Phase I HCAS

13. What’s Going on Behind Wireless

14. Public Safety Solutions Phase I NCAS

15. What’s Going on Behind Wireless

16. Public Safety Solutions Phase II NCAS

17. What’s Going on Behind Wireless Frequently Used Terms(Phase II) Latitude – Y coordinate. Distance from equator. Above equator = “+” (positive number) Below equator = “-” (negative number) Longitude – X coordinate. Distance from Prime Meridian. East of Prime Meridian = “+” (positive number) West of Prime Meridian = “-” (negative number) MPC – Mobile Positioning Center. Facility owned by the Wireless Carrier, or 3PDB that uses Position Determining Equipment (PDE) to provide Latitude and Longitude of mobile caller. Public Safety Solutions

18. What’s Going on Behind Wireless Frequently Used Terms(Phase II) PDE – Position Determining Equipment. 3 Types: Handset Based Network Based Hybrid Public Safety Solutions

19. What’s Going on Behind Wireless

20. QUESTIONS? Public Safety Solutions

21. What’s Going on Behind Wireless Public Safety Solutions