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Outage in Celeste

Telephony - Degraded Call Quality with Swisscom

Resolved Minor
October 01, 2026 - Started 6 days ago - Lasted about 6 hours
Official incident page

Incident Report

We are currently investigating a general issue affecting call quality on our telephony services (garbled audio, crackling). We apologize for the inconvenience and will provide updates as soon as possible.
Components affected
Celeste Telephony services

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Latest Updates ( sorted recent to last )
RESOLVED 6 days ago - at 10/01/2026 02:17PM

EN: This incident has been resolved. Telephony services are now operating normally since 15:50. We apologize for any inconvenience caused.

DE: Dieser Vorfall wurde behoben. Die Telefoniedienste funktionieren seit 15:50 Uhr wieder normal. Wir entschuldigen uns für die entstandenen Unannehmlichkeiten.

FR: Cet incident est résolu. Les services de téléphonie fonctionnent normalement depuis 15h50. Nous nous excusons pour la gêne occasionnée.

IDENTIFIED 6 days ago - at 10/01/2026 09:57AM

EN: We have identified an issue on our interconnection link with Swisscom, causing degraded call quality on calls to and from Swisscom numbers. We are currently working together with Swisscom's engineering teams to resolve this issue. The problem is still ongoing — we will keep you informed.

DE: Wir haben ein Problem auf unserer Verbindung mit Swisscom identifiziert, das zu einer verschlechterten Anrufqualität bei Anrufen von und zu Swisscom-Nummern führt. Wir arbeiten derzeit gemeinsam mit den Ingenieuren von Swisscom an der Lösung dieses Problems. Das Problem besteht weiterhin – wir halten Sie auf dem Laufenden.

FR: Nous avons identifié un problème sur notre liaison d'interconnexion avec Swisscom, provoquant une dégradation de la qualité des appels à destination et en provenance des numéros Swisscom. Nous travaillons actuellement avec les équipes d'ingénierie de Swisscom pour résoudre ce problème. Le problème est toujours en cours — nous vous tiendrons informés.

INVESTIGATING 6 days ago - at 10/01/2026 08:08AM

We are currently investigating a general issue affecting call quality on our telephony services (garbled audio, crackling). We apologize for the inconvenience and will provide updates as soon as possible.

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