Date/Time Impacted

Between Jun 22, 2023 13:00:00 UTC and Jun 22, 2023 23:41:00 UTC

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Services Impacted

Pre-registered transactional traffic towards all China networks

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Summary

Vonage’s downstream local supplier started rejecting all pre-registered transactional traffic across all China networks from 13:00 UTC 22 June. Normal service was restored at 23:41 UTC 22 June. 

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Root Cause

The IP network on the landing side of our supplier was overloaded, and their SMS platform was disconnected. 

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Restoration Actions

Our supplier changed to a new IP to restore service to their SMS platform.

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Next Steps

• To reduce time to detect, we will improve our alerting when a network supplier isn't delivering messages within expected time range.

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