This read-write integer, from 1 to 8, assigns voice traffic to a specific priority class defined by bandwidth weight, but only takes effect when sysVoiceHighestPriority is set to no. An administrator uses this to give voice a competitive but not absolute priority relative to other traffic classes when strict highest-priority treatment isn't desired. For example, setting this to class 2 would let voice traffic compete favorably for bandwidth alongside other classes rather than always preempting everything else.