Here are resources to help you configure your Ecessa Edge QoS features
Quality of Service Classes and Configuration: https://support.ecessa.com/hc/en-us/articles/200143866-QoS-Classes-and-Configuration
Optimizing VoIP using QoS Features: https://support.ecessa.com/hc/en-us/articles/200143056-Optimizing-Voice-over-IP-VoIP-using-Quality-of-Service-QoS