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California Public Utilities Commission


									             Cox Customer Premise Power
            California Public Utilities Commission
            “Performance Reliability Standards”
                Technical Workshop February, 2009
Note: Cox California Telcom, LLC (“Cox”) provides telephone services for Cox customers.
The information presented in this workshop presentation is intended to provide an overview
of Cox’s practices related to the topics of this proceeding. This presentation is intended to
be informational, and does not alter or waive any legal arguments made or incorporated by
reference by Cox in its comments in this proceeding.
               Power Reserve Overview

• What method of back-up powering does Cox use today for installed
  customer premise equipment?
• What are the Cox standards and practices for back-up power?
   –   Battery specifications
   –   Customer notification policy
   –   Battery status monitoring process
   –   Battery replacement policy and process
• Cox summary, comments and recommendations
                                       Mark Adams
            Senior Director of Network Reliability, Quality and Network Assets
                        Corporate Office – Cox Communications

                                       Member Of
                 ATIS National Reliability Steering Committee (NRSC)
                  IEEE Communications Quality and Reliability (CQR)
                         National Coordinating Center (NCC)
              ATIS National Reliability & Interoperability Council VII (NRIC)

    Background: Types of Power Events

“Typical” Power Events
• Classified as routine failures of a commercial power plant not caused
  or triggered by catastrophic events
      –   e.g. surges, sags, localized storms, brown-outs, etc.
      –    Normal power events are typically short in duration (greater than
           99% of events are less 4 hours in duration)
• Battery back-up is a good technology choice to address the majority
  of typical power events

 “Extreme” Power Events
• Caused or triggered by catastrophic events (declared disasters) –
   frequently of long duration
• Due to duration, battery back-up is not necessarily the best
   technology choice to address many extreme power events

Cox Deployed Power Back-up Technologies

         Internet VoIP
Customer Premise Equipment (CPE)

• Our legacy voice platform (launched in 1996)has network powered
  equipment at the customer premise (no batteries are necessary)
• Our newer voice platform (launched in CA in 2006)uses batteries
  installed in equipment (telephone modem) at the customer premise
  to provide power back-up
• Note: Some commercial equipment owned by the customer is not
  under our control and may not be deployed or maintained to Cox

                     * Battery and/or Emergency Restoration          4
 Customer Premise Back-up Configuration

Residential Voice Services
• Cox installs a Lithium Ion (Li-ion) battery pack in its Embedded
  Multimedia Terminal Adaptors (“EMTA” or “telephone modem”) with
  a typical reserve capacity of 4 to 6 hours of talk time and 6 to 10
  hours of standby time
Commercial Voice Services
• Specification is minimum of 8 hours talk time for smaller line EMTA
  (e.g. 2 line) via Li-ion battery
• A UPS is used to satisfy the 8-hour runtime standard for larger
  multi-line EMTA (e.g. 8 and 12 line)

 Customer Premise Back-up Configuration

Battery Service Alerts
• EMTA battery indicator LED: Battery installed or bad/low battery
• Cox monitors battery status remotely

Estimated Battery Life before Replacement
• Dependent on many factors but conservatively we estimate 4 to 6
  years (though manufacturers may state 6 to 10 years)

Typical Recharge Time
• Dependent on manufacturer, technology and reserve capacity but
  typically 10 to 36 hours for a full charge

                      Customer Notification

• Customers are informed at time of sale and through equipment label,
  per FCC requirements, that CPE equipment contains batteries that
  are necessary to maintain service when a power outage occurs:
          Text of Label Affixed to CPE Modem (available in English and Spanish):

                          Your Safety is Important to Us.
        Your telephone service will continue to operate on battery backup
        for up to eight hours during a power outage. If the modem is
        disconnected or removed and the battery is not charged,
        telephone service, including E911, will not be available.

        To ensure that E911 dispatchers receive your correct address,
        the installed modem should not be moved within your home or to
        another address.

        Please notify Cox if you would like to move or relocate your
        telephone modem or service.

                          CPE Monitoring

Monitoring and Replacement
• A Cox National Policy on CPE battery monitoring and replacement
  was initiated in 2006:
   – CPE device technology detects battery status (e.g. installed/missing) and
     calculates battery health (e.g. capacity or ability to hold a charge)
   – Batteries are monitored by maintenance personnel via our Edgehealth application
   – Batteries are flagged for replacement if missing or in need of maintenance (<80%
   – Customers with CPE in need of maintenance are proactively contacted to schedule
   – Battery replacement is arranged with the customer

                          Cox Summary

• Cox is very focused on customer satisfaction and reliability
    – Designs and implements the network for high reliability
    – Participates in Federal and industry advisory boards (e.g. NRIC, NCC, NRSC,
      IEEE) for improving reliability

•   Relative to Power Reserve
    – Many newer communication technologies rely on CPE battery for power reserve
    – Cox has implemented proactive measures to provide backup battery power for
      CPE if power is interrupted
    – Cox communicates the importance and placement of the battery in the CPE
    – Cox monitors the network and CPE equipment and identifies faults
    – A replacement policy and process is in-place to address those batteries needing

          Comments & Recommendations

• CPE battery technology is the most cost-effective solution for typical
  power outages
• The FCC will be adopting specific standards for network backup power
   – Each provider’s network architecture and services dictate the best customer
     premises backup power solution
   – Customer notification practices help to ensure consumers are aware of the battery
     back-up capabilities of their specific telephone equipment
• The vast majority of users now have a second technology (e.g.
  wireless) available with much longer power reserve capacity than most
  typical CPE can provide
• Cox has noted that consumer factors may negate the benefit of any
  proposed “standard” for backup power at customer premises:
   – Many consumers purchase only cordless handsets for household use, which require
     AC power to operate
   – Consumers choosing “bring your own broadband” voice services will not benefit from
     any backup power, as wired broadband services are not designed to operate during
     power outages


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