While analyzing Cisco Jabber to Cisco Jabber communication using Wireshark, I noticed the Audio Media has the DSCP of CS0, As you can see below, the DSCP has CS0 in the RTP packet, which is QoS terms is best effort – first in, first out. This gives definitely no priority to your voice media. Is the DSCP Value CS0 the default DSCP of Cisco Jabber client?
Even though in the Clusterwide Enterprise Parameters, the default DSCP value for Audio Calls is EF.

