SIP US incident

Inbound Fax Transmission Issues

Resolved after 16 hours 55 minutes, affecting Fax Service, on February 25, 2026.

resolved Feb 26, 2026, 03:30 PM UTC

Service has been fully restored, and we have validated that inbound faxes and notifications are once again being handled and delivered correctly.

Started
Feb 25, 2026, 10:34 PM UTC
Resolved
Feb 26, 2026, 03:30 PM UTC
Duration
16h 55m
Detected by Pingoru
Feb 25, 2026, 10:34 PM UTC

Affected components

Fax Service

Update timeline

  1. investigating Feb 25, 2026, 10:34 PM UTC

    We are aware that multiple customers are reporting issues with incoming faxes failing to be delivered. We are actively investigating the matter and will provide an update as more information becomes available.

  2. identified Feb 25, 2026, 11:05 PM UTC

    We have identified that inbound fax transmissions are successfully reaching the fax service; however, the Fax ATAs are not processing the fax transmissions correctly. We are actively investigating the matter and will provide an update as more information becomes available.

  3. monitoring Feb 26, 2026, 01:23 AM UTC

    Faxing service partners have identified a root cause and reverted changes that had contributed to delivery issues. Faxing services have resumed and are being monitored.

  4. resolved Feb 26, 2026, 03:30 PM UTC

    Service has been fully restored, and we have validated that inbound faxes and notifications are once again being handled and delivered correctly.

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