This is the class of service classification to
the traffic transmitting on this VLAN. The class
of service determines the priority of the traffic.
The default VLAN for voice traffic is '4095', and
the default service classification is
'interactiveVoice'. The classification on the VLAN
'4095' cannot be modified by the network management
system. The service classification on all other
VLANs are 'bestEffort'.