https://www.juniper.net/documentation/us/en/software/junos/cos/topics/topic-map/cos-on-demux-interfaces.html
Class of Service on demux Interfaces | Junos OS | Juniper Networks
This topic describes class of service (CoS) functionality and configuration on demux interfaces. demux interfaces support basic CoS functionality including...
class of serviceinterfacesjunosjunipernetworks
https://vitalpbx.com/blog/understanding-class-of-service/
Class Of Service: Simple Tricks To Solve Different Scenarios
Jul 21, 2022 - The class of service (COS) is one of the most important modules in VitalPBX. The objective of the COS is to define the call permissions for a group of users
class of servicesimpletrickssolvedifferent