Daily: SIP / PSTN Disruption
Affected components: SIP/PSTN
Timeline of updates
- investigating
We are currently investigating an issue affecting SIP / PSTN inbound calls. Customers may encounter 480 “Temporarily Unavailable” errors when attempting to receive calls. Our engineering team is actively working to identify the root cause and restore service.
- identified
Our upstream carrier partner has identified the root cause of the issue impacting SIP/PSTN dial-in (inbound) calling and has implemented a fix. Service is beginning to recover, though some degradation may still be present while the fix fully propagates. We are actively monitoring and working to confirm full restoration of inbound calling. Outbound (dial-out) calling remains unaffected.
- monitoring
The fix from our upstream carrier partner has been applied, and service has been restored for SIP/PSTN dial-in (inbound) calling. We are seeing successful inbound call connections again, and our internal testing confirms recovery. We are continuing to monitor closely to ensure stability and full recovery.
- resolved
This incident has been resolved.
Changes Rewindex caught on this incident
Archive proof
Rewindex commits each version of an incident it captures to a daily checkpoint, chains it to the day before, and has the checkpoint timestamped by FreeTSA and DigiCert. That proves this record existed by then and has not been changed since, by anyone, Rewindex included.
How the archive is checked, and what it cannot prove.
First version captured 17:33 UTC
In the 2026-10-19 checkpoint, timestamped by FreeTSA and DigiCert on Oct 20, 00:41 UTC. Record hash
12c5483e5089c4a1…
Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab).