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California Public Utilities Commission


									Overview of Wireless 9-1-1 Service Levels
in California

                                     Michael Aguilar
                               Regulatory Analyst
                           Policy Analysis Branch
                        Communications Division
            California Public Utilities Commission
                                     January 7, 2011
Wireless E9-1-1 Service in California is governed
• FCC Order 94-102 requirements on wireless service
  providers to deliver 9-1-1 calls to the local Public Safety
  Answering Point (PSAP), if the PSAP requests it

• Public Utilities Code (PUC) Section 2892(a) which
  requires 9-1-1 calls to be delivered at no charge for
  airtime, access or similar usage charge and without the
  need for user validation or a service subscription

• PUC Section 2892(b) which governs what California
  agency has the authority to take the wireless 9-1-1 call

All Wireless 9-1-1 calls are routed by carriers to
the California Highway Patrol (CHP) unless three
things occur, as defined by PUC 2892(b):

1.   the local PSAP agrees to take wireless 9-1-1 calls --
     some do not
2.   the call is not from a freeway or highway -- CHP’s
3.   the CHP agrees to have the carrier re-route the call to
     the local PSAP -- some cell sectors overlap highway
     and local jurisdiction

The Warren-911 Emergency Assistance Act gives
primary authority to the California 9-1-1
Emergency Communications Office (9-1-1 Office)
for implementation, funding and operational
standards governing California’s 9-1-1 system.
The 9-1-1 Office plays the key role of coordinating the
  parties needed to implement wireless 9-1-1 service:

• the CHP
• local PSAPs
• wireless service providers -- who deliver the calls to the
  wireline 9-1-1 network for delivery to the CHP or PSAP
• 9-1-1 Network and Database Managers (AT&T and
  Verizon) -- who establish the routing keys required to
  deliver wireless 9-1-1 calls through the wireline system
The 9-1-1 Office Wireless E9-1-1 Project --
• Preparing all California public safety answer points
  (PSAPs) to accommodate the information to be delivered
  by wireless carriers under Phase I and Phase II of the
  FCC Order.
• Phase I specifies that the telephone number and
  receiving cell site or sector of the 9-1-1 caller be
  delivered to the PSAP.
• Phase II adds a more precise location, (usually with 50-
  100 meter accuracy or better) in the form of
  latitude/longitude coordinates, to the Phase I
• On September 7, 2007 California became 100 %
  compliant with deployment of Phase II cell sites in
  Mariposa and Lassen counties.
• A major emphasis of the wireless project is the
  redistribution of statewide wireless 9-1-1 call volumes
  from the CHP to local PSAPs                              5
The 9-1-1 Office RED Project -- Routing on
Empirical Data
• In 2007, 42% of wireless calls received busy signals or
  failed to get answered
• Many of the calls answered by the CHP had to be
  transferred to local PSAPs with jurisdiction for the call --
  causing unnecessary delay to emergency response
• The RED project is an analysis of actual caller locations
  by cell sector, to determine the jurisdiction where the
  majority of calls originate.
• Slide one: Wireless calls from one cell sector in Ventura
• Slide two: CHP and Local PSAP calls identified
• The CHP and local PSAP review the historical data of
  each cell sector to determine whether rerouting from
  CHP to the local PSAP is needed
Slide one: Wireless 9-1-1 Calls from one cell sector in Ventura

Slide two: CHP and Local PSAP calls identified

RED Project Accomplishments and Statistics:
2007 – 2010 time period
• As of June 30, 2010 38% of cell sectors were accepted
  for re-routing to local PSAPs -- reducing call transfers
  and improving response times
• As of October 2010, the number of wireless calls
  receiving a busy signal or failing to be answered dropped
  from 42% to 5%
• The number of successfully processed wireless calls
  went from 11.6 Million to an expected 14.2 Million
• The CHP increased their call taking ability from 3.5 to 6.9
• The number of calls processed by Local PSAPs has
  more than doubled from 3.1 to 6.6 Million
• Please refer to the 9-1-1 Office handout on the RED

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