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

2. Data Source Database snapshot as of August 7, 2017
NORS Final Outage Reports through June 2017 were used in the analysis

3. Frequency of Outages by Month
Monthly Trend 1.6%
(up from 1.5%)

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
4.8%
(up from 3.7%)

6. DS3 (Non-Simplex) Events
Monthly Trend 1.8%
(unchanged)

7. Big DS3 Outages

8. Big DS3 Outages
Monthly Trend 2.1%
(down from 2.8%)

9. DS3-Simplex
Monthly Trend 1.9%
(down from 2.0%)

10. Fiber Cut
Monthly Trend 0.6%
(unchanged)

11. E911
Monthly Trend 1.0%
(up from 0.8%)

12. Very Large E911 Outages
No Trend
(unchanged)

13. E911 – Phase 2 Events
Monthly Trend 2.4%
(up from 1.5%)

14. Wireline
No Trend
(up from -0.7%)
Wireline outages are all outages for which the Reason Reportable was at least 900,000 wireline user-minutes.

15. Wireless
Monthly Trend
0.9%
(up from 0.6%)

16. Monthly Trend 6.1% (up from 4.6%)
VoIP Reporting
Monthly Trend 6.1% (up from 4.6%)

17. Environmental – External
Monthly Trend 1.2% (down from 1.3%)

18. SS7
Monthly Trend -2.3%
(down from -1.9%)

19. Malicious Events
Monthly Trend -2.3%
(unchanged)

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

21. Hardware Failure
Monthly Trend 1.6%
(unchanged)

22. Power Failure
Monthly Trend 1.9%
(down from 2.0%)

23. Diversity Failure
Monthly Trend 1.8%
(down from 2.7%)

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). 7

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).

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 has increased from 2016 to 2017 (statistically significant using a Mann-Whitney test).

30. Test for Trend in Event Duration
Non-DS3-Simplex Outages
Data from 7/2014 thru 6/2017
DS3-Simplex Events Only
Data from 7/2014 thru 6/2017
Rank Correlation of duration with date is and is significant at the level
Rank Correlation of duration with date is .054 and is significant at the level
Conclusion: Durations of Non-DS3-Simplex Outages have shortened over the period from 7/2014 to 6/2017.
Conclusion: Durations of DS3-Simplex Events have lengthened over the period from 7/2014 to 6/2017.

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