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Power Reserve Overview

Cox Customer Premise Power California Public Utilities Commission “ Performance Reliability Standards ” Technical Workshop February, 2009.

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Power Reserve Overview

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  1. Cox Customer Premise PowerCalifornia 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.

  2. 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 Presenter 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)

  3. 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

  4. Cox Deployed Power Back-up Technologies Internet VoIP Provider 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 standard * Battery and/or Emergency Restoration

  5. 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)

  6. 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

  7. Customer Notification Awareness • 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.

  8. 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% capacity) • Customers with CPE in need of maintenance are proactively contacted to schedule replacement • Battery replacement is arranged with the customer

  9. 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 replacement

  10. 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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