This object describes the mode of SNMP traffic for this
device in relationship to connectivity to network management
station. This will be used to define default behavior for
the device based on the on available bandwidth for
management.
'undefined' : Traffic mode is not defined.
'inBand' : SNMP traffic uses same physical interfaces as
voice traffic.
'outOfBand' : SNMP traffic does not use same physical
interfaces as voice traffic.