Ciptex incident
Twilio - Inbound SIP Calls With OPUS Codec Only Blocked
Ciptex experienced a minor incident on September 15, 2026 affecting Ciptex NOC General Notifications, lasting 2h 49m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Sep 15, 2026, 08:13 PM UTC
We have detected potential service disruption through our monitoring systems and are actively investigating. A detailed assessment of the impact and affected services will be provided within the next 30 minutes.
- monitoring Sep 15, 2026, 08:17 PM UTC
Twilio have identified an issue whereby some calls made to Twilio using Programmable Voice SIP interfaces and OPUS codec may unexpectedly be rejected. Customers may see a SIP 488 responses for those requests. The Twilio engineering team is working on a fix. We will provide another update in 2 hours or as soon as more information becomes available.
- monitoring Sep 15, 2026, 10:28 PM UTC
Twilio engineers have implemented a fix and are monitoring system performance. We will provide another update in 2 hours or as soon as more information becomes available.
- resolved Sep 15, 2026, 11:02 PM UTC
Following comprehensive monitoring, we can confirm that the incident has been fully resolved and all services have returned to normal operation.