From 12:58 pm UTC to 05:23 pm UTC, one of our mediaserver in US-West Zone had DNS cache entries issue.
It was routing some of the outbound calls to the wrong IP addresses for 2 outbound SIP proxies before relaying to the carriers and PSTN
The mediaserver has been removed from production and a patch has been deployed to fix the DNS entries to avoid any future cache issue.
Impact :
- From 12:58 pm UTC to 05:23 pm UTC
- 10% of the outbound calls to PSTN in the US West zone terminating with cause call rejected.