Value,Description,Reference
0,"(Unused to allow the direct mapping of        
parameter names to MIB object names)",[RFC2216]
1,Generic,[RFC2215]
2,Guaranteed service,[RFC2212]
3-4,Unassigned,
5,Controlled-load service,[RFC2211]
6-127,Unassigned,
128-254,Experimental or private services,[RFC2216]
255,Reserved for future expansion,[RFC2216]