Announce Trunks option allows you to chose whether or not system will announce secondary/tertiary trunks used, if primary/secondary fails.

1. Login to the system administration.
2. Navigate to Settings: Servers.
3. Click on the edit icon corresponding to the server.
4. Navigate to the "General Settings" group.
5. Select "Announce Trunks" "Yes" , "No" , or "N/A" value.
6. Click on the "Save" button