Respond.io incident

Voice Calling Disruption: Telnyx and WhatsApp Calls

Respond.io experienced a major incident on September 29, 2026 affecting Voice (Voice), lasting 1h 37m. The incident has been resolved; the full update timeline is below.

Started: Sep 29, 2026, 12:30 PM UTC
Resolved: Sep 29, 2026, 02:07 PM UTC
Duration: 1h 37m
Detected by Pingoru: Sep 29, 2026, 12:30 PM UTC

Affected components

Voice (Voice)

Update timeline

identified Sep 29, 2026, 12:30 PM UTC

We are currently experiencing an issue affecting voice calls on Telnyx channels and WhatsApp calling. Some customers may be unable to place or receive calls, or may experience dropped calls or audio issues. This coincides with scheduled maintenance by Telnyx on their voice services across...
investigating Sep 29, 2026, 01:00 PM UTC

We have identified that this issue is now affecting all voice calls on Telnyx channels and WhatsApp calls. You may currently be unable to place or receive calls. We have escalated this to Telnyx as a priority and are working with them to restore calling as quickly as possible. We sincerely...
resolved Sep 29, 2026, 02:07 PM UTC

This issue has been resolved. Voice calls on Telnyx channels and WhatsApp calling have been working normally since 23:07 JST. Between 20:38 and 23:07 JST, calls routed through our Telnyx SIP connection were being rejected at the carrier level (SIP 403), which prevented calls from being...