Outage in Twilio
Inbound SIP Calls With OPUS Codec Only Blocked
Resolved MinorIncident Report
Summary AI Generated
Twilio's Programmable Voice SIP Interface (US1) experienced an issue lasting approximately 2.9 hours where inbound SIP calls using the OPUS codec were unexpectedly rejected with SIP 488 responses. Engineers identified the root cause, implemented a fix, and monitored system performance before confirming full resolution. All services returned to normal operation.
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. We will provide another update in 2 hours or as soon as more information becomes available.
Components affected
Twilio SIP Interface US1Trusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
about 12 hours ago - at 09/15/2026 11:00PM
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.
MONITORING
about 13 hours ago - at 09/15/2026 09:54PM
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.
MONITORING
about 15 hours ago - at 09/15/2026 08:09PM
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. We will provide another update in 2 hours or as soon as more information becomes available.
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