# Sinch: Critical incident: Service Degradation – Calling – AP-Southeast-1

**Summary:** _summary pending_
- Kind: Major incident · Label: critical (vendor)
- Changed: 2026-09-22 05:40 UTC · Detected: 2026-10-19 17:33 UTC
- [Source: https://stspg.io/cbj5vjc9868r](https://stspg.io/cbj5vjc9868r)
- [Company: Sinch](https://rewindex.com/company/sinch.md)
- Versions: before (none: first archived) → after incident\_version:703/cydfsvr8xkc0@ae3b575ba8b4
- Change 1 of 1 for this incident

Incident page (full timeline): [Service Degradation – Calling – AP-Southeast-1](https://rewindex.com/company/sinch/incidents/cydfsvr8xkc0.md)
## What changed

**1. Added: Title**

```diff
+ Service Degradation – Calling – AP-Southeast-1
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-09-22 05:40 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-09-22 08:36 UTC
```

**6. Added: Affected components**

```diff
+ Data Calling, Phone Calling (PSTN), SIP Trunk, Video Calling, Voice - Data Calling, Voice - Phone Calling (PSTN), Voice - SIP Trunk, Voice - Video Calling
```

**7. Added: Update** (investigating) · 2026-09-22 05:40 UTC

```diff
+ We want to inform you that we are currently experiencing a performance degradation impacting our Calling services in the AP-Southeast-1 region. Incident Start Time: 2026-09-22 04:50 UTC Impact: Customers may experience delayed or failed attempts via In-app Calling / PSTN Calling/ Video Calling and SIP Trunk . We sincerely apologize for any inconvenience this may cause and appreciate your understanding while we work to resolve the issue. For further information or assistance, please contact us at support@sinch.com.
```

**8. Added: Update** (investigating) · 2026-09-22 07:09 UTC

```diff
+ We are continuing to investigate this issue.
```

**9. Added: Update** (monitoring) · 2026-09-22 08:15 UTC

```diff
+ A fix has been implemented and we are monitoring the results.
```

**10. Added: Update** (resolved) · 2026-09-22 08:36 UTC

```diff
+ This incident has been resolved. Incident Start Time: 2026-09-22 04:50 UTC Incident End Time: 2026-09-22 07:23 UTC
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-09-22 05:40 UTC | Critical incident: Service Degradation – Calling – AP-Southeast-1 (this change) | critical |

All Sinch changes: [timeline](https://rewindex.com/company/sinch/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/ic193989a7c37fe · Markdown: https://rewindex.com/change/ic193989a7c37fe.md · JSON: https://rewindex.com/api/v1/changes/ic193989a7c37fe · Generated 2026-10-19T21:44:30.271Z