1. Analysis of Network Outage Reports
Cybersecurity and Communications Reliability Division – Public Safety & Homeland Security Bureau
John Healy
May 2017

2. Data Source Database snapshot as of May 3, 2017
NORS Final Outage Reports through March 2017 were used in the analysis

3. Frequency of Outages by Month
Monthly Trend 1.5%
(up from 1.3%)

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

5. New Planned Maintenance Cause Codes
Monthly Trend
3.7%
(up from 2.5%)

6. DS3 (Non-Simplex) Events
Monthly Trend 1.8%
(down from 1.9%)

7. Big DS3 Outages

8. Big DS3 Outages
Monthly Trend 2.8%
(up from 2.4%)

9. DS3-Simplex
Monthly Trend 2.0%
(up from 1.5%)

10. Fiber Cut
Monthly Trend 0.6%
(down from 0.8%)

11. E911
Monthly Trend 0.8%
(up from 0.6%)

12. Very Large E911 Outages
No Trend
(unchanged)

13. E911 – Phase 2 Events
Monthly Trend 1.5%
(up from 1.2 %)

14. Wireline
Monthly Trend -0.7%
(up from -0.9%)
Wireline outages are all outages for which the Reason Reportable was at least 900,000 wireline user-minutes.

15. Wireless
Monthly Trend
0.6%
(up from 0%)

16. Monthly Trend 4.6% (up from 3.4%)
VoIP Reporting
Monthly Trend 4.6% (up from 3.4%)

17. Environmental – External
Monthly Trend 1.3% (down from 1.4%)

18. SS7
Monthly Trend -1.9%
(down from -1.4%)

19. Malicious Events
Monthly Trend -2.3%
(down from -2.2%)

20. Malicious Activity
The figures for 2017 are through March.

21. Hardware Failure
Monthly Trend 1.6%
(up from 1.3%)

22. Power Failure
Monthly Trend 2.0%
(down from 2.3%)

23. Diversity Failure
Monthly Trend 2.7%
(down from 3.4%)

24. Duration Trends: DS3 Non-Simplex
The duration of DS3 Non-Simplex outages has decreased from 2016 to 2017 (statistically significant using a Mann-Whitney test).

25. Duration Trends: E911
The duration of E911 outages is statistically unchanged in 2017 compared with 2016 (using a Mann-Whitney test).

26. Duration Trends: Wireline
The duration of Wireline outages is statistically unchanged in 2017 compared with 2016 (using a Mann-Whitney test).

27. Duration Trends: Wireless
The duration of Wireless outages is statistically unchanged in 2017 compared with 2016 (using a Mann-Whitney test). 13 12

28. Duration Trends: DS3 Simplex
The duration of DS3 Simplex outages is statistically unchanged in 2017 compared with 2016 (using a Mann-Whitney test).

29. Duration Trends: VoIP
The duration of VoIP outages is statistically unchanged from 2016 to 2017 (using a Mann-Whitney test).

30. Test for Trend in Event Duration
Non-DS3-Simplex Outages
Data from 4/2014 thru 3/2017
DS3-Simplex Events Only
Data from 4/2014 thru 3/2017
Rank Correlation of duration with date is and is significant at the level
Rank Correlation of duration with date is .056 and is significant at the level
Conclusion: Non DS3-Simplex Outages are shorter in duration from 4/2014 to 3/2017
Conclusion: DS3-Simplex Events are longer in duration from 4/2014 to 3/2017

31. NORS Transition
March 6, 2017 – Moved to the production version of NORS 3.0 on ServiceNow platform
NORS Coordinators Meetings
Weekly meetings during transition
Moving to monthly meetings
NORS User Manual
In development