The value of this object identifies the type
of ATM traffic descriptor.
The type may indicate no traffic descriptor or
traffic descriptor with one or more parameters.
These parameters are specified as a parameter
vector, in the corresponding instances of the
objects:
atmxTrafficDescrParam1
atmxTrafficDescrParam2
atmxTrafficDescrParam3
atmxTrafficDescrParam4
atmxTrafficDescrParam5.