
VIEW Configuration Guide: Enterasys Networks
26
Defining Classes of Service
It is only necessary to adjust the classes of service if the SIP server, PBX, or handsets are using a DSCP tag
to CoS (Class of Service) mapping that is not already defined in the Enterasys controller. The defined
mapping in the Enterasys controller is shown in the table below.
Default Settings for DSCP Tags to Service Class Mapping
• The defaults for the 80xx phones for class of service and DSCP tags depend on the Telephony Type
selected from the Admin menus. They are Voice (Premium – class 6) 46 and Video (Gold (4)) – 40
or 26. This values work with the default values in the Enterasys.
• The defaults for the 8400 Series phones for class of service and DSCP tags are Voice (Premium –
class 6) 46 and Video (Gold (4)) – 44. 44 does not work properly for prioritizing the control frames
with the default of the Enterasys. Configurations can be used to set the 8400 Series phones to a
different DSCP value. This can be achieved using the phone web browser on a phone by phone
basis. Here is a screen shot of the setting, reached as Settings from the top menu->Network-
>QoS.
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