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IP Telephony E911 Requirements

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Presentation on theme: "IP Telephony E911 Requirements"— Presentation transcript:

1 IP Telephony E911 Requirements

2 Mo Zonoun Scope For the IP Telephony several regulatory issues need to be addressed. The key regulatory requirement which may impede on the implementation and market acceptance of IP Telephony is the Emergency Call Location (E911) for police, medical and fire assistance. National Emergency Number Association (NENA) defines requirements for E911 and makes recommendation for FCC requirements. This presentation addresses only the E911 issues.

3 Mo Zonoun E911 Features The local central office routes the calls (Selective Routing) with Automatic Number Identification (ANI) and Automatic Location Identification (ALI) to the public safety answering point (PSAP). Some of the E911 features are: - ANI, ALI, Selective Routing - Congestion Control - Call Back Number - Call Hold - Ringback - Call Priority - Call Trace/ Locate - Busy verification and interrupt - Auditing Trails

4 Mo Zonoun E911 Call and Information Flow CO E911 Selective ANI 7 digit ANI 8 digit PSAP ALIALI ALI SRDB E911 TSS Subscriber Information E911 ALI Update SR Updates Service Order Voice Path Signal Path router

5 Mo Zonoun NENA’s Model State Legislation NENA is writing requirements for Model State Legislation: Based on the current seven state legislations for a minimum requirement. Applies to residential, commercial and hotel/motels. Requires Emergency Response Location (ERL) with building address and floor of the caller. Residential and Workspace less than 7000 sq. ft. located on a single contiguous property (one ERL), Key System provide only one ERL, MLTS (PBX) with less than 49 stations and more than 40,000 sq. ft-contiguous property-one ERL. The Model State Legislation for hotel/motel will require that the operator ensure connection to 911 so that PSAP clearly identify address and unit of caller with ANI/ELIN and ALI for each telephone set, or provide automatic means to connect caller and PSAP with an individual that is knowledgeable of the facility- ALI can be substituted with individual communication specific location. This Model Legislation has been put on the NENA web site for comment ( ).

6 Mo Zonoun FCC Wireless Requirements Handset-Based Solutions (Wireless Carrier) Must support: —Accuracy of 50 meters for 67 percent of calls —Accuracy of 150 meters for 95 percent of calls —Phase in new, modified, or upgraded handsets beginning March 1, 2001 —Ensure that at least 50 percent of all new handsets activated are ALI- capable by October 1, 2001 —Ensure that at least 95 percent of all new handsets are ALI-capable by October 1, And 100 percent penetration by Dec 31, 2004 For Network-Based Solutions: —100 meters for 67 percent of calls —300 meters for 95 percent pf calls —50 percent of callers within six month pf a PSAP request

7 Mo Zonoun IP Telephony Location ID Problems IP Telephones are not tied or physically connected to their geographical location and their locations are dynamic. Transmission medium is varied. It may be wired, wireless, LAN, WLAN, Cable TV, DSL or Satellite. There are a large number of IP domains and service providers policies (i.e. telco, cable co., cellular, pcs or isp), information retrieval is not scalable calls require guaranteed end-to-end QoS. Security is an issue. The location information should be made available only to the authorized agencies.

8 Mo Zonoun IPMobile IP TCPUDP Access layer Network layer Transport layer PPPMobile PPP 802.3PSTN IP Telephony E911 Protocol Stack Application layer PSAP


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