On 6th February 2019 at 13:03:59 UTC, inbound and outbound Voice API calls in the Washington DC data center began to fail and call control was not possible. The issue was quickly identified, and service restored at 13:12 UTC. Customers experienced inbound calls being terminated without answering, and outbound calls failing immediately after being answered.
Following routine maintenance of the Nexmo Voice platform, an internal DNS issue was identified and manifested across the Washington DC data center. This issue stopped calls being routed correctly and API requests for call control not to be routed correctly. The issue was caught by the monitoring of the platform.
A program of work has been identified that includes:
Enhancing monitoring and logging
Enhanced proactive tests to capture issues quickly
Improvements in the underlying infrastructure