Twilio experienced a notice incident on September 15, 2026 affecting SIP Interface US1, lasting 2h 51m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- monitoring Sep 15, 2026, 08:09 PM UTC
We have identified an issue with some calls made to Twilio using Programmable Voice SIP interfaces and OPUS codec may unexpectedly be rejected. Customers would see a SIP 488 responses for those requests. Our engineering team is working on a fix.
- monitoring Sep 15, 2026, 09:54 PM UTC
Our 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, 11:00 PM UTC
Our engineers have monitored the fix and confirmed the issue with Twilio Programmable Voice SIP interfaces and OPUS code has been resolved. All services are now operating normally at this time.