Bell attributes multi-province 911 outage to hidden software flaw

Bell disclosed that an undetected software issue in its NG9-1-1 emergency-calling infrastructure caused a service interruption beginning at 3:13 a.m. ET on September 17, impacting six provinces. The problem was resolved at 4:40 a.m., and a permanent remedy was deployed later that morning. Backup mechanisms handled the majority of calls, while older voice calls routed through legacy systems were missed, though no critical incidents occurred.

Early alarm signals at 3:13 and 3:19 a.m. did not trigger the expected war-room response, and engineers were only alerted 24 minutes later by a separate monitoring system. Bell is installing independent monitoring tools, conducting an end-to-end review, and sharing lessons with other providers. The company redacted technical details to avoid exposing vulnerabilities, and regulators have extended the deadline for decommissioning legacy 911 systems.