Sinch Scheduled Maintenance - Elastic SIP Trunking

Scheduled for Jun 16, 13:00 - 14:00 UTC

Scheduled

Sinch Elastic SIP Trunking will be deploying an emergency software update to add additional features and functionality. The purpose of this update is to add support of "603+" which a newer SIP response code used in U.S. voice networks to signal that a call was blocked by the network, usually because it was identified as likely illegal, fraudulent, or unwanted traffic.

The scheduled work is not expected to impact services. This is being sent as a courtesy notice in the event that you experience issues with your service during the maintenance window.

For information about our product enhancements, we encourage you subscribe to our Elastic SIP Trunking Release Notes posted in the Sinch Community at: https://community.sinch.com/

Posted Jun 11, 2026 - 04:55 UTC

This scheduled maintenance affects: Elastic SIP Trunking (Outbound Calling).