Respond.io incident
Voice Calling Disruption: Telnyx and WhatsApp Calls
Resolved after 1 hour 37 minutes, affecting Voice (Voice), on September 29, 2026.
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...
Affected components
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...
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