Northwestern University incident
Off-Campus Telephone Call Audio Failure
Resolved after 3 hours 51 minutes, affecting Telephone Services (Videoconferencing and Telephones), on June 9, 2026.
Northwestern IT has identified a probable cause for the issue and has implemented a change that should resolve the issue. Testing is being performed to verify that things are working properly again. The next update will be made by 10:00pm CDT.
Affected components
Update timeline
- investigating Jun 09, 2026, 09:31 PM UTC
Northwestern IT is investigating reports of one way audio (one party can hear the other, but not vice versa) on some telephone calls that are being made from off-campus telephones to University phone numbers. At this point in time only a small proportion of calls are experiencing the issue. Our telephone service carrier has been engage to assist with analysis and troubleshooting. The next update will be made by 6:00pm CDT.
- investigating Jun 09, 2026, 10:49 PM UTC
Northwestern IT continues to work with our local telephone service carrier to resolve the issue with one way audio on calls between University phones and off-campus phones. The issue is impacting both inbound and outbound calls. On campus calls are not affected. The next update will be provided by 8:00pm CDT.
- monitoring Jun 10, 2026, 12:58 AM UTC
Northwestern IT has identified a probable cause for the issue and has implemented a change that should resolve the issue. Testing is being performed to verify that things are working properly again. The next update will be made by 10:00pm CDT.
- resolved Jun 10, 2026, 01:23 AM UTC
This incident has been resolved.
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