Analysis of Network Outage Reports Cybersecurity and Communications Reliability Division – Public Safety & Homeland Security Bureau John Healy December 2016

Frequency of Outages by Month Monthly Trend 1.2%

Outage Index – For All Outages Except DS3-Simplex See ATIS-0100021 Analysis of FCC-Reportable Service Outage Data for a description of the method used to calculate the outage index.

New Planned Maintenance Cause Codes Monthly Trend 2.3% Up from 2.1%

DS3 (Non-Simplex) Events Monthly Trend 2.0%

Big DS3 Outages

Big DS3 Outages Monthly Trend 2.5%

DS3-Simplex Monthly Trend 1.1% Up from 0.8%

Fiber Cut Monthly Trend 0.5% Down from 0.7%

E911 No Trend

Very Large E911 Outages No Trend

E911 – Phase 2 Events No Trend

Wireline Monthly Trend -0.9% Wireline outages are all outages for which the Reason Reportable was at least 900,000 wireline user-minutes.

Wireless Monthly Trend 0.0% Up from -0.5%

Monthly Trend 2.3% Up from 2.0% VoIP Reporting Monthly Trend 2.3% Up from 2.0%

Environmental – External Monthly Trend 1.2% Down from 1.4%

SS7 Monthly Trend -1.1%

Malicious Events Monthly Trend -1.6% Down from 0.0%

Malicious Activity The figures for 2016 are through September.

Hardware Failure Monthly Trend 0.9%

Power Failure Monthly Trend 2.6%

Diversity Failure Monthly Trend 4.4%

Duration Trends: DS3 Non-Simplex The duration of DS3 non-simplex outages is statistically unchanged in 2016 compared with 2015 (using a Mann-Whitney test). 11

Duration Trends: E911 The duration of E911 outages is statistically unchanged in 2016 compared with 2015 (using a Mann-Whitney test). 6

Duration Trends: Wireline The duration of Wireline outages is statistically unchanged in 2016 compared with 2015 (using a Mann-Whitney test). 110

Duration Trends: Wireless The duration of wireless outages is statistically unchanged from 2015 to 2016 (using a Mann-Whitney test). 12

Duration Trends: DS3 Simplex The duration of DS3 simplex outages increased from 2015 to 2016 (statistically significant using a Mann-Whitney test). 234 208

Duration Trends: Other Special Facilities The duration of other special facilities outages is statistically unchanged from 2015 to 2016 (using a Mann-Whitney test). 7

Duration Trends: VoIP The duration of VoIP outages is statistically unchanged from 2015 to 2016 (using a Mann-Whitney test). 10

Test for Trend in Event Duration Non-DS3-Simplex Outages Data from 1/2014 thru 9/2016 DS3-Simplex Events Only Data from 1/2014 thru 9/2016 Rank Correlation of duration with date is -.018 and is significant at the .0001 level Rank Correlation of duration with date is .016 and is not significant at the .05 level Conclusion: Non DS3-Simplex Outages are shorter in duration from 1/2014 to 9/2016 Conclusion: DS3-Simplex Events are unchanged in duration from 1/2014 to 9/2016

NORS Transition NORS coordinators began to test the new system in April June 2 - Training session on the new NORS August 29 – Public Notice on new NORS is published August 31 – CenturyLink, T-Mobile and Verizon cutover to new platform September – Remaining companies cutover to new platform

NRSC Activities Current Teams Best Practices Team Outage Reporting Advisory Team Improvements to the NORS System Improvements to the template Recommended ways to communicate information Improvements to NORS/DIRS manuals IP Transition Team Consistent Use of Cause Codes Silent failures